Windows 7 constant restart

This problem started this morning. I haven't added any new programs or downloads since uploading to Windows 7, five days ago.

Windows constantly restarting my computer. Gets half-way through loading, says "Windows had a problem check online for fix... yes or no" Doesn't matter what you hit, it restarts. I'm online now in safe mode. Scanned for viruses. No virus. Computer no hotter than normal (warm) What is wrong?

I am and end user, not a computer geek, so I have little to no idea how to fix it.
I have Dell Inspiron 1545 bought 2 months ago.

Thank you for any help.

More information on my constant crash and restart.

Stop ox0000003B
OS 6.1.7600.2.0.0.768.3
033
BC Code 3b
system service exception

Hi.

http://www.sevenforums.com/crash-lockup-debug-how/34900-1-novice-how-ask-help-bsod-problem.html