Malicious Software Removal Tool

How to Use the Malicious Software Removal Tool in Vista

information   Information
This will show you how to open and use the Malicious Software Removal Tool (MRT) to manually run scans for and automatically remove malicious software.

For more information and FAQs about the Malicious Software Removal Tool, please read:
The Microsoft Windows Malicious Software Removal Tool helps remove specific, prevalent malicious software from computers that are running Windows 7, Windows Vista, Windows Server 2003, Windows Server 2008, Windows XP, or Windows 2000


Tip   Tip

  • The Microsoft Malicious Software Removal Tool is normally installed and updated on the second Tuesday of every month by the KB890830 Windows Update.
  • After a scan with MRT, the scan log is located at: C:\Windows\Debug\mrt.log
  • After a scan with MRT, yhe event log is located at: C:\Windows\Debug\mrteng.log
Note   Note
The Malicious Software Removal Tool normally runs in quiet mode. If it detects malicious software on your computer, the next time that you log on to your computer as a computer administrator, a balloon will appear in the notification area to make you aware of the detection and prompt you to run a full scan.
warning   Warning
The Microsoft Malicious Software Removal Tool does not replace an antivirus program. It is strictly a post-infection removal tool. Therefore, it is strongly recommend that you install and use an up-to-date antivirus program.

The Microsoft Malicious Software Removal Tool differs from an antivirus program in three key ways:
  • The tool removes malicious software from an already-infected computer. Antivirus products block malicious software from running on a computer. It is significantly more desirable to block malicious software from running on a computer than to remove it after infection.
  • The tool removes only specific, prevalent malicious software. Specific, prevalent malicious software is a small subset of all the malicious software that exists today.
  • The tool focuses on the detection and removal of active malicious software. Active malicious software is malicious software that is currently running on the computer. The tool cannot remove malicious software that is not running. However, an antivirus product can perform this task.



Here's How:
Note   Note

The Windows Malicious Software Removal Tool - (KB89030) Windows Update will need to be installed first before you will have it available in Windows Vista.



If not, then you can also download and install it manually from Microsoft at:

1. Open the Start Menu.​
2. In the white line (Start Search) area, type mrt.exe and press Enter. (See screenshot below)​
NOTE: You can also type mrt.exe in the RUN window. This file is located at C:\Windows\System32\mrt.exe.​
Start_menu.jpg

3. If prompted by UAC, click on Continue.​
4. Click on the Next button. (See screenshot below)​
Step1.jpg

5. Select and dot the type of scan you would like to run and click on Next. (See screenshot below)​
Step2.jpg

6. It will now start the scan and can take a bit to finish depending on what scan type you selected in step 5. (See screenshot below)​
Step3.jpg

7. When finished, it will report the scan results. (See screenshot below step 8)​
8. Click on the Finish button when you are ready to close the Microsoft Malicious Software Removal Tool window.​
NOTE: To see detailed scan results, click on the View detailed results of the scan link.​
Step4.jpg

Tip   Tip

How to Run the "Windows Malicious Software Removal Tool" from the Command Prompt

In a command prompt, type mrt.exe followed by one of the switches below. For example, type mrt.exe /F:Y to run a full scan and automatically clean the infected files.

MSRT6.jpg




That's it,
Shawn


 

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I didn't even know you could run this, I just thought it ran when it installed with the windows update. Thanks
 

My Computer

System One

  • Manufacturer/Model
    HP Compaq Presario/SR5113WM
    CPU
    AMD Athlon 64 X2 3600+ 1.9Ghz
    Motherboard
    Asus M2N68-LA
    Memory
    PNY Optima Memory DDR2 2GB 2x1 kit
    Graphics card(s)
    PNY Nvidia 8400 GS 256MB
    Sound Card
    On board RealTek
    Monitor(s) Displays
    Acer X163W LCD
    Screen Resolution
    1366x768
    Hard Drives
    Western Digital 160 GB SATA 3G (3.0Gb/sec) 7200 rpm Western Digital 160 GB IDE
    PSU
    Dynex 400w
    Case
    Nothin Special
    Cooling
    Stock
    Mouse
    Wireless Logitech LX7
    Keyboard
    Standard 102 key with volume and sleep buttons
    Internet Speed
    Comcrap 10mb cable
    Other Info
    Insignia 2.1 speakers, wireless Xbox 360 controller w/plug n play charger, Belkin wireless G + mimo usb network adapter.
You're welcome a.jayathilaka and Mansrm81.

Thank you,
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
Thanks for the info on this. I to did not know you could run it when ever you wanted.
I learn more every day.
Many thanks.
Brian.
 

My Computer

System One

  • Manufacturer/Model
    ME
    CPU
    AMD 64 X2 5200+
    Motherboard
    ASUS M2N-E SLI
    Memory
    4 GB CORSAIR CM2X 6400 C5 800MHZ
    Graphics card(s)
    PNY Geforce 980GTX+ 512MB DDR3
    Sound Card
    AUDIGY 2
    Monitor(s) Displays
    ViewSonic VA2216w 22" wide screen
    Screen Resolution
    1680 x 1050
    Hard Drives
    2 X SAMSUNG SATA 500GB 1 external usb 500GB
    PSU
    650 WATT
    Mouse
    IntellieMouse Optical
    Keyboard
    Logitech G15
    Internet Speed
    2mb
You're welcome Brian. I didn't know about it either at first until I just clicked on it to see what it did.

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
Is there a way to place a shortcut to start menu from this program?
thanks, and I really do like the "format" that this site supplies. i.e., breaking down the info to a newbies (me) level.
 

My Computer

System One

  • Manufacturer/Model
    HP Pavilion a6407c-b
    CPU
    AMD Athlon 64 X2 dual core processor 4400+
    Monitor(s) Displays
    hp w2007
    Screen Resolution
    hp w2007 1680x1050
    Case
    yup, black one. kinda dusty though.
    Cooling
    yup, leave windows open all the time.
    Mouse
    yup.. little one.
    Keyboard
    yup, black and grey
    Internet Speed
    mouse speed in negative terms
Hello Jakeers,

Yes. You can right click on the C:\Windows\System32\mrt.exe file and click on Send To - Desktop (Create shortcut). From there you can move the shortcut into the Start Menu.

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
Yeah I've been looking at the tutorials for the past 2 days now,and have managed to free up considerably disk space,there are so many little hints n tips that most of us dont seem to not know about.Thanks Brink

ps loving Auslogics BoostSpeed & Disk DeFrag:D
 

My Computer

System One

  • Manufacturer/Model
    Own
    CPU
    AMD FX 8120 Black Edition,3.1GHz oc'd to 4GHz
    Motherboard
    Gigabyte GA-990FXA-UD7
    Memory
    Corsair Vengeance 12GB DDR3 1600Mhz
    Graphics card(s)
    EVGA GTX 570 HD SuperClocked
    Monitor(s) Displays
    24" BenQ EW2430 LED Monitor
    Screen Resolution
    1920x1080
    Hard Drives
    2TB Seagate ST2000DM001 Barracuda 7200,SATA 3 6GB/s. 128GB OCZ Octane, 2.5" SSD.
    PSU
    850W Powercool PCPC850AUBA
    Case
    Xclio Touch 767 Full Tower,With Touch Panel.
    Cooling
    Antec Kúhler H2O 620 Watercooler
    Mouse
    Sharkoon FireGlider Gaming Mouse
    Keyboard
    Razer Arctosa Black Edition Gaming Keyboard
    Internet Speed
    Virgin 30-35Mb/s
    Other Info
    Krator N4-21U26W Neso4 Avante Garde 2.1 Speaker
You're welcome Jaffa.

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
This post (and the whole tutorial section for that matter) was very useful, thank you for having such useful info on this site!!
 

My Computer

System One

  • Manufacturer/Model
    Sony VAIO/VGN-NR280E notebook
    CPU
    Intel Core 2 duo CPU @ 1.67 ghz
    Memory
    1.0 GB
    Graphics card(s)
    Onboard Mobile INTEL 965 Express Chipset Family
    Monitor(s) Displays
    Generic PnP Monitor(15.4" LCD screen)
    Screen Resolution
    1280 x 760
    Hard Drives
    200GB FUJITSU MHY2200BH
You're welcome Jeddess. :)

Thank you,
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 Shawn, does the MRT really works?
 

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.

I never was in a situation where I needed to use it, but I would image that it could be handy if you picked up some form of malware that it can clean from your system for you.
 

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
yeah you are right.
lets keep it as a precautionary method . . . just in case
 

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
Hi Shawn, does the MRT really works?

G'Day dinesh,

Yes it does work. In Jul 08 I had cause to seek Windows Live OneCare Support. Before entering a 'Shared session' with the WLOC Techs., they had me first run a Quick Scan [which came up clean], and then secondly, a FULL MSRT SCAN. We were in phone contact, and because the Full Scan takes about 6 hours to complete, an arrangement was made for them to call back later. At re-connection, the Shared Session was initiated, and the results of the Full MSRT Scan were produced.

A variant of a Java Script Virus was found and quarantined on two file threads on my D/Drive. A few moments later, these were deleted and gone forever. I've had no further problems since, and the MSRT does it's thing, silently each month.

As a general comment, I must add that the 'clean-up' if anything is discovered in the MSRT scan, is a clear and easy procedure to follow.
 

My Computer

System One

  • Manufacturer/Model
    Acer Aspire Notebook 5633WLMi.[5630 Series]
    CPU
    Intel Centrino Duo Processor - Intel Core 2 CPU.
    Memory
    4GB DDR2 [3.07GB maximum real available]
    Graphics card(s)
    nVidia GeForce Go 7300, 128MB
    Sound Card
    Realtek HD Audio, Ver. 6.0.1.5717, 2.08MB
    Monitor(s) Displays
    Acer Aspire Notebook - 15.4"; Acer LCD Monitor X223Wsd - 22".
    Screen Resolution
    1280x800x60Hertz [max.]
    Hard Drives
    Notebook - Samsung HM320JI 320GB HD installed 07 August 2009. External HDs [4];Maxtor One Touch4 - 500GB External HD [Drive M:\].Western Digital WDXMS1200TA - 120GB External HD [Drive G:\ - Windows Defender Backup Files only]. Two x LaCie 320GB Mobi
    Mouse
    Logitech Wireless V320 for Notebooks - Model M/N: M-RCD125
    Internet Speed
    Down 20000kb/sec / Up 1000kb/sec [Bigpond-Aus]
    Other Info
    Brother MFC-465CN; PC to Fax/Scan/Copy/Photo MFC. Epson Perfection V300 Photo Scanner. Siemens Speedstream 6520 Router. Wacom 'Bamboo Fun' CTE-650 PC Tablet, Stylus and Mouse. UAC - On;Activated. Browsers; [1] FireFox v3.6[2] IE8. Honorary R.S.M. to the 4th [Assault Pioneer] Troop Pune Sepoys , and 3rd Troop Jodhpur Bengali Lancers.
You're welcome Dylana. :)
 

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
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