omg..can someone PLEASE help =/

[KohakuSan]

It's probably your motherboard or the connections to the video card, I was having exactly the same problem when I built this computer last year. Well, the only thing I could do to fix was to take out the Floppy drive, yes, don't ask my this worked but it did, I'm sure it was the floopy because when I putted it back the problem came back too.
It could be an old HDD(like mine) that corrupts the files and possibly the system files(like mine too)
I hope this works for you and that's what worked for me. And if nothing works, buying a new computer is a good option if you have the money(not like myself >.<)
Good luck.