so yeah randomly my pc crashed so I restarted it and I had to do a system repair and then I was back on it again all fine and so on then today it happened again but sysem repair just freezes and goes to a black screen and when I click boot from cd it dosent it just does the exact same procces as the 1st one also I can get to bios but I cant get to safe mode so im not sure what could have happened but I have the repair cd but that don't work I also tested the ram they work fine so im not sure what it could be totally stumped