1) Use the vista DVD to go to the repair mode.
2) From the same
screen where you do the system restore, there's an option to open an
administrative command prompt.
3) That should open in X:\Sources or
something like that
4) Go to the windows drive by entering C:
5)
Now go to the windows event log folder on your machine
(C:\Windows\System32\winevt):
cd c:\windows\system32\winevt
6) ren
Logs Logs_bad
7) mkdir Logs
This will create an empty folder for
new event logs.
Restart the system. Hope this helps
-CompDoctor
instructions from website
here