I did the memtest with a ubuntu live cd. it worked and the memory is fine. windows runs fine on the new system. Its just when I try to load any linux system live or install. these disks have worked before on all my other computers. I put the live disk into the drive(I tried 4 different ones) and I restart. its starts to load the disk os. then during the install ubuntu locks up, mepis says halted can't find file system. and knoppix says can't find file system. I will try again and type what it says word for word.