Thanks Mak. I was setting up my system after installing windows 7 64 bit. I reached the stage where I wanted to partition my Hard Drive. I tried to download Easus partition manager but it wasnt available to work on the 64bit install. So I used a program called paragon partition manager, i set it to give me 2 partitions of 150GB each, then it said for me to reboot so I did - then my system stuck at the splash screen, so i cut the power and switched back on. From here it wont enter BIOS and the DVD drive (which is set up as first boot), wasnt recognising the windows 7 install disc, when I put it in to try a brand new reinstall. So - now im going to burn a linux live iso to dvd and then reboot with that inside my dvd drive, hopefully it will read the disc - then from here im wondering if I partition it again to fix the MBR, so that I can nullify the corrupted partition tables, which you adivsed may be the problem. Failing this - maybe my mobo has stopped working (not sure). if the linux live dvd doesnt work, i may have to get someone to come out and look at it.