computer freezing intermittently

[Awesemo]

I have been having this problem recently with my computer freezing shortly after I boot it up. This is a freeze where the mouse stops working and everything stops including any music. After the computer crashes, and I try to boot it up, it won't even load the BIOS. After several minutes it will boot up again and then freeze. I tried loading it up in safe mode and it froze in that too. This is not a overheating problem I don't think because when the bios does load the cpu temperature is ridiculously low. Strangely, after I started having this problem, and I didn't use the computer for a week, the next time I used it, it worked like normal. How can I fix this problem?