Even Kaspersky Rescue disc cannot help. But at least now I have the disc for future aid.
Error message: "windows has encountered a critical problem and will restart..."
And before I know it, my vista ultimate 32bit laptop shut down. Not even safe-mode could help.
Judging from anti-virus (Malwarebytes & Miscrosoft Essential Security) info, I figure it was the file services.exe in windows\system32.
Renaming the file would only cause reboot before windows screen.
So the solution is: I copied the file from my other vista box to flash drive. Loaded the Vista disc in laptop in Repair mode. Went into msdos, copied the services.exe file from flash drive to laptop. Now everything seems to work.