I installed Fallout 3 and played it for about five hours or so, and I have a noticeable problem...It freezes (just gets stuck on the current image, not blue screen etc.), and I often have to restart my computer manually, since my monitor just doesn't react. I would be alright with it if it was like every every few hours or so, but it freezes way more often. Should I just reinstall it and see how it works afterwards or is it more serious? Sorry for my english, I am a foreigner.

EDIT: I'm sorry, I meant freezes instead for crashes, sry if the title is misleading. I play the goty edition with all five add-ons installed