so my brother is coming over in a few hours claiming that he needs help with a his laptop...he somehow broke it

. anywho, from the phone convo, here is what i gathered:
Stuck in some sort of infinite re-boot loop. you can start in safe mode, and system restore did not work. he said something about a matrix looking screen, but i don't know what he was talking about. there are people online if you search this in Google with the same problem, not sure how they fixed, but i guess it could be a Windows Update, or NVIDIA driver update.
unfortunately because of the matrix screen im thinking it could be a wicked virus.
Any ideas i will be great full for, as i will have a limited amount of time to attempt a fix.
Its an Dell desktop btw.