Windows 7 upgrade fail

I'm an intermediate computer user and I just upgraded to windows 7 from windows vista (64).

During the installation of Windows 7 it didn't work the first time and said it restored my old OS.

I tried again and it actually finished installing. But except now my computer only works in safe mode. If I try to start windows normally I get an unexpected reboot that brings me to a screen to choose how to start windows. Sometimes my desktop will load up, but then within minutes it will reboot again out of nowhere.

Can someone help me?

Also... When i first started the installation of Windows 7, there is a first CD used to update system BIOS and firmware. I walked away for a minute and came back to a screen that said my laptop was put into hibernation to protect it from over heating. I'm not sure if that part was done yet, but it definitely said not to turn off my computer while it was installing that part.

Does that have something to do with my problem now?