Hello dmex,
Yes, reproducible. I have repeated the procedure twice now.
But, and this is a big but, it worked on my computer and i have no way of knowing for certain that it will work across the board.
So, I am quite willing to describe the steps I took, but
I will not take any responsibilty for anything anybody does with his/her computer.
The steps I took; 1 -15
How to upgrade from Vista Enterprise/SP1 to Vista Ultimate/SP1
Starting position:Vista Enterprise/SP1; version 6.0.6001.18000; SP1 integrated install
Available for upgrade: Vlited slipstreamed SP1 Vista Ultimate, version 6.0.6001.17028
All the files/DVDs are genuine and originate from M$
Objective: to upgrade the Enterprise version, whilst retaining all the installed programs and data, i.e. to avoid a clean install
Precautions. These may or may not be necessary
1. Make an image of your computer with e.g. Acronis.
2. Disconnect from the Internet.
3. Exit all running programs.
4. If you have overclocked, put it back on stock speed.
1. Start up your computer, sign in as true Administrator.
2. Open regedit and change two registry keys:
3. Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurentVersion
4. Change the key: ProductName from
“Windows Vista ™ Enterprise” to “Windows Vista ™ Business”
5. Change the key: EditionID from “Enterprise” to “Business”
6. Do not restart your machine.
7. Insert the Enterprise/SP1 DVD.
8. The first choice is whether you want to go online for the latest updates, etc.
9. Before answering, swap your Enterprise/SP1 DVD with your Vlited SP1 slipstreamend Ultimate DVD.
10. Select No. You can always update later.
11. The next ‘step’ is where you are being asked to enter your Ultimate product key.
12. Enter your Ultimate key, but disable the automatic activation option.
(Remove the check mark).#
13. The next step is to accept the T&C.
14. You should now have arrived at the ‘Upgrade / Custom’ option. Select the ‘Upgrade’option.
15. The next screen will list the five stages of the upgrade process:
a) Copying; b) Gathering; c) Expanding; d) Installing; e) Completing
The first two stages are the important ones. It’s here where Vista copies and gathers the files it needs (i.e. the ‘Ultimate files’). Your Ultimate disk is still in the drive, so that’s fine. Let Vista run and copy and gather.
16. Stage a) and b) should progress without any problem. At a certain moment during stage c) (with my computer at 18%), your computer will do a restart.
17. Let the computer restart and continue with the setup. However, your computer may crash upon restart, complaining about a missing or corrupt ‘winload.exe’. Mine did, but yours might not.
18. If, howeve, it does, replace the Vlited SP1 slipstreamed Ultimate DVD with the Enterprise/SP1 DVD. Stages c); d) and e) are, imho, generic in nature and do not specifically require the Ultimate DVD anymore.
19. Restart your crashed computer, using Ctrl-Alt-Del and let it boot from the Enterprise/SP1 DVD. Select language and other preferences, and click on ‘Next’
20. Now select ‘Repair your computer’
21. You should now be presented with a choice. Obviously, you don’t need to repair your still fully functional Enterprise installation, so naturally choose to repair the new ‘setup’.
22. Let Vista run and repair. Upon completion, restart the computer and boot from the hard disk as normal.
23. If everything went according to plan, setup should now continue, picking up where it left off.
24. Stage c) should complete without any further problem.
25. Stages d) and e) should complete without any further problem.
26. After you’ve done, clean up your hard disk.
1. If your computer crashes and you’ve a Raid setup, you might need to do a verify/repair.
2. If your computer crashes in step 17, swap the DVDs as advised. I found that (for me) leaving the Ultimate disk in the drive and using that DVD, didn’t work, i.e. the repair was ineffective. Don’t ask me why.
Regards,
Boudewijn