Msconfig set to safe mode

I have a Dell Inspiron 6000 with Windows XP. I changed the msconfig settings to safe mode to try to remove a virus. When I try to turn it on i get a blue screen informing me that there is a reason that will not let windows start and to restart my computer, when i restart again, I get the same blue screen. No matter what option I choose; safe mode, safe mode with networking, start windows regularly, or last known good configuration, I get that same blue screen, and I was wondering if there is a way I can change the msconfig back to regular boot even though i can not get passed the blue error screen.

Ok, sorry I guess I'm not being totally clear, since the computer will not allow windows to start, no matter which option i choose from the safe mode screen ( it only boots to the safe mode options screen ) I don't see how i can follow your direction to use "Start> Run> type in eventvwr". The blue screen says technical information: STOP: 0x0000007B. My main concern is not why the computer will not start in safe mode, but how to get the computer to stop wanting to be booted in safe mode and to be able to boot to windows.