There is also a short version of this in the "stop vista timer in chinese", copy of that here since this subject will probably be read a lot more.
Also works with already installed vista, as i checked myself with home premium x86.
Download This
- Open CMD with admin rights
- Set dir to c:\windows\system32
- Set date to 31-12-2099 with DATE command
- cscript slmgr.vbs - rearm
- Restart
- Open CMD with admin rights
- Set date back to current date with DATE command
- Run Vista test crack.exe from the expanded rar contents
- Click on install service on the window that opens
- Restart
You can check that it works after a few minutes / hours with
- Open CMD with admin rights
- Set dir to c:\windows\system32
- cscript slmgr.vbs -dlv
"time remaining" should stay stable at 43200 minutes.
And big thanks to KEZ for this great site/forum !

[/center]