You're probably bluescreening . . .
By the way . . . the service packs are cumulative . . . you should've
installed ONLY SP4.
1. START in SAFEMODE (F8 at the opening DOS-looking start up screen)
2. RIGHT CLICK on MY Computer and choose PROPERTIES
3. Select the ADVANCED tab, then the STARTUP AND RECOVERY button
4. Uncheck AUTOMATICALLY REBOOT
Now, start normally . . . then when you bluescreen you can see the error and
work from their.
NOTE: If you do not see an error on a bluescreen . . . then possibly you
have a virus.
