Take Ownership of file

How to Take Ownership of a Item in Vista and Windows 7


information   Information
This will show you how to take Ownership of a file, folder, registry key, or drive where you have been denied access to allow you to give full control of it so that you will be able to delete or modify this item. When you do this, you replace the security permissions to have access.

Note   Note
You will quickly notice that you cannot delete or modify system files, even as administrator in Vista. This is because Vista system files are owned by the TrustedInstaller service by default, and Windows File Protection will keep them from being overwritten. You will encounter a "Access Denied" error.

Tip   Tip

  • If you are trying to delete a folder, then sometimes you will need to delete the contents within the subfolders first before you will be able to delete the main folder itself.
  • The hidden My ..... folders are actually a Junction Point to the real username user folders. They cannot be modified since they are not a real location. EX: My Documents for C:\Users\(your username)\Documents
  • For more on junction points, see: jimmah.com: Why do I get an Access Denied error when trying to open a folder?
  • Sometimes you will need to move the file to the desktop or a user folder first before Vista will allow changes to be made to it. You can then move the file back afterwards.
  • You will sometimes need to take ownership of Files and folders created in another operating system when migrated into Vista.
warning   Warning
This can only be done while logged on to a administrator account. Deleting or modifying system files without knowing what you are doing may lead to eratic behavior from Vista. Even complete system failure with full data loss.


EXAMPLE: You need permission to perform this action
NOTE:
You will see this Access Denied with the Try Again type message when your user account or group does not have Ownership of the file. Clicking on the Try Again does nothing.
Need_Permission.jpg





OPTION ONE
Take Ownership of Item Using Context Menu






OPTION TWO
Take Ownership of Item in Command Prompt

EX: To Take Ownership of this System file:
C:\Windows\System32\en-US\winload.exe.mui

EX: User name to Take Ownership with: Brink
2. In the elevated command prompt, type the command below and press Enter to take ownership of the file.​
NOTE: Substitute full path of file with the full path of the file that you want to take ownership of within quotes.
takeown /f "full path of file"
For example:
takeown /f "C:\Windows\System32\en-US\winload.exe.mui"

3. A message will be displayed that this completed successfully. This will give you ownership of the file.​
4. In the same elevated command prompt, type the command below and press Enter to grant a user full control of the file.​
NOTE: Substitute full path of file with the full path of the file from step 2 within quotes , and (user name) with your user name.
icacls "full path of file" /grant (user name):F
For example:
Code:
icacls "[B][COLOR=red]C:\Windows\System32\en-US\winload.exe.mui[/COLOR][/B]" /grant [B][COLOR=red]Brink[/COLOR][/B]:F

5. A message will be displayed that this completed successfully.​
NOTE: You should be able to delete or modify the file now. If you still can't, you may need to reboot into Safe Mode and try this again. It may vary according to the file. Some are more stubborn.




OPTION THREE
To Manually Take Ownership of a Item

1. Go to the file, folder, drive, or registry key you want to delete or modify.​
NOTE: For example, the system file:
C:\Windows\System32\en-US\winload.exe.mui

2. For a File, Folder, or Drive
A) Right click on the file, folder, or drive and click on Properties.​
WARNING: Do not do this to the hard drive partition that Vista is installed on. It can mess up the boot files.​
For example, the file: winload.exe.mui

B) Go to step 4​

3. For a Registry Key
A) Click on the key in the left pane to highlight the registry key (folder).​
B) Right click on the key and click on Permissions, or click on Edit (Menu Bar) and Permissions.​

4. Click on the Security tab and on the Advanced button. (See screenshots below)​
Properties1.jpg
Registry_Advanced.jpg

5. Click on the Owner tab. (See screenshot below)​
NOTE: For a Registry key, go to step 8 after this.​
WARNING: You should make note of who the current Owner is so you can change it back to it later if you like.​
6. Click on the Edit button.​
7. If prompted by UAC, click on Continue.​
Owner.jpg

8. Under the Change owner to section, click on your user account name and click on OK. (See screenshots below​
NOTE: If you have a check box for Replace owner on subcontainers and objects, then check it if you want to take ownership of them as well. You will not see this option when taking ownership of just a file. Only with a folder.
EX. Username: Moderator (Computer Name/Username)​
Owner2.jpg
Owner2_Folder.jpg

9. Click on OK at the Security pop-up window. (See screenshot below)​
NOTE: For a Registry Key, you will not see steps 9 to 12. Go to step 13.​
Security.jpg

10. Click on OK. (See screenshot below step 7)​
11. Click on the Edit button. (See screenshot below)​
Properties2.jpg

12. If prompted, click on Continue in the UAC prompt.​
13. Click on the Add button. (See screenshot below)​
Permissions.jpg

14. To Type in Your User Account Name
NOTE: If your user account name is already listed, then do step 15 instead.​
A) Type in your user account name in the box under Enter the objects name to select. (See left screenshot below)​
NOTE: For example, Moderator. If you needed to restore TrustedInstaller as the owner, then see: How to Restore TrustedInstaller as Owner of a File in Vista
B) Click on the Check Names button.​
NOTE: If the username is found, then see right screenshot below. If it is not found, then go to step 15 below to select it.​
C) Go to step 16.​
Select_User_Groups1.jpg
Select_User_Groups2.jpg


15. To Select Your User Account name
A) Click on the Advanced button. (See left screenshot above)​
B) Click on the Find Now button. (See screenshot below)​
C) Under Search results, click on your user account name to highlight it.​
NOTE: For example, Moderator. If this is for something like a Flash USB drive, you may also want to select Everyone and give it full permission to. This way you will be able to access it from any user account.
D) Click on OK.​
Advanced_Select.jpg


16. Click on OK. (See right screenshot above step 15)​
17. Click on your user account name to highlight it. (See screenshot below)​
NOTE: For example, Moderator (Computer Name/Username)
18. Check the box for Full Control.​
NOTE: For more information on these permission choices, see: Windows Help and How-to: What are Permissions?
19. Click on OK.​
NOTE: For a Registry Key, you will not see steps 20 and 21. Go to step 22.​
Permissions2.jpg

20. Click on Yes in Windows Security pop-up. (See screenshot below)​
Confirmation.jpg

21. Click on OK. (See screenshot below step 11)​
22. Your Done. You can now delete or modify the item.​
23. If you wanted to, repeat the steps and change the Owner back to the previous owner you noted from step 5 above.​
That's it,
Shawn



 

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Hi Hound,

Thank you for posting back your results. You may just have a defective one.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
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    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Hi Brink,

I have more than one key causing me problems the first one on the list:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\BTH

All of the keys are associated with bluetooth.

Thanks

You might try and see if you can take ownership of the BTH key while in Safe Mode. This way it would not be use.

http://www.vistax64.com/tutorials/123496-safe-mode.html


Tried safe mode to take ownership of my bluetooth registry keys and still the same result. I had been trying to remove the keys after uninstalling bluetooth from the device manager so it shouldn't have been in use anyway. Think I need to try a completely different tack, thanks for the help.
 

My Computer

Vonkarmanstreet,

I agree, but I must admit that I do not know what else to try for this. :(

You might also post this in the General Discussion forum to see what other suggestions you mat get.

I hope you get a solution soon,
Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Your welcome Bunzl, and welcome to Vista Forums.

Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Hi Brink, can i take ownership of registry keys too(if i enter the path of the registry key)? Also please explain what are the uses and importance of "take ownership".
Thanks & Regards,
Dinesh.
 

My Computer

System One

  • Manufacturer/Model
    Compaq
    CPU
    intel core 2 duo T 5550 @ 1.83 MHz
    Motherboard
    intel 965 chipset family
    Memory
    2 GB DDR 2 SD RAM @ 667 MHz
    Graphics card(s)
    On board upto 358 MB RAM
    Sound Card
    Onboard
    Monitor(s) Displays
    15"
    Hard Drives
    160 GB WDC
Hello Dinesh,

Yes, you can take ownership of a registry key. Step 3 in Method Two (Option Two) will help show you how to.

I have updated the information box at the top of the tutorial to give a better detail explanation of the purpose of taking ownership of a item to be able to allow your account full control over a item to be able to modify or delete it.

Hope this helps,
Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
thank you shawn,
you are wonderful...
 

My Computer

System One

  • Manufacturer/Model
    Compaq
    CPU
    intel core 2 duo T 5550 @ 1.83 MHz
    Motherboard
    intel 965 chipset family
    Memory
    2 GB DDR 2 SD RAM @ 667 MHz
    Graphics card(s)
    On board upto 358 MB RAM
    Sound Card
    Onboard
    Monitor(s) Displays
    15"
    Hard Drives
    160 GB WDC
Your welcome Dinesh.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
How would I take back My C: drive? :P
 

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
How would I take back My C: drive? :P

Open an elevated command prompt and type

"Icacls C:\ /setowner %username% /c /q"

If that doesnt work take the \ of the end of C:

Good Luck.
 

My Computer

System One

  • Manufacturer/Model
    Hewlett Packard
    CPU
    3.40Ghz / 2.20Gz Duo Core
    Memory
    2GB / 3GB
    Hard Drives
    160 GB / 160 GB
Hello pjjppj,

In addition to Fmjc001's post, your C: drive should have the owner as TrustedInstaller with your administrator account listed as having "Full Control" Allowed.

What does your C: drive say in it's Security tab Properties window?

Hope this helps,
Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
Hello pjjppj,

In addition to Fmjc001's post, your C: drive should have the owner as TrustedInstaller with your administrator account listed as having "Full Control" Allowed.

What does your C: drive say in it's Security tab Properties window?

Hope this helps,
Shawn

Unable to display current owner.
 

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
That does not sound good. Try booting into Safe Mode and see if you can check it there.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
Are you trying this while logged onto an administrator account?
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
On to the hidden administrator. And on My account
 

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
I would recommend doing a System Restore (Method Two) using a restore point dated before you lost TrustedInstaller as the owner to see if it can fix this and allow you to also see who the owner of your C: drive is again.
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2, 4TB Samsung 990 PRO PRO M.2, 8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master 3
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system, Logitech BRIO 4K Pro webcam, HP Color LaserJet Pro MFP M477fdn, APC SMART-UPS RT 1000 XL - SURT1000XLI, Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
The system restore file is on the C Drive:( It cant open
 

My Computer

System One

  • CPU
    Mobile DualCore Intel Core 2 Duo T7100, 1800 MHz (9 x 200)
    Motherboard
    Sony VGN-FZ18L Intel Crestline-PM PM965
    Memory
    1GB DDR2 SDRAM
    Graphics card(s)
    NVIDIA GeForce 8400M GT (64 MB)
    Sound Card
    SigmaTel STAC9872AK @ Intel 82801HBM ICH8M - High Definition
    Hard Drives
    TOSHIBA MK1637GSX (160 GB, 5400 RPM, SATA-II)
    Mouse
    Alps Pointing-device for VAIO
    Keyboard
    Standard PS/2 Keyboard
    Internet Speed
    20MB Virgin Media
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