Have you added any new hardware lately? Any new changes to your computer?
See if you can boot into safe mode by tapping the F8 key before the Windows loading screen. From there you will be presented with a list of options to start in safe mode. From here you have a couple options.
1) you can try the last known good configuration
If that does not work you can try to boot into safe mode
2) START> RUN and type in sfc /SCANNOW
If that does not work try a system restore.
3) Once in safe mode you can use the following steps to perform a system restore:
Click START>ALL PROGRAMS>ACCESSORIES>SYSTEM TOOLS>SYSTEM RESTORE
This will restore your computer to a previous stable state.
Hope this helps
Edited by ice2921, 07 October 2008 - 07:40 AM.