I have a strange problem with my new PC. I ve upgraded from a celeron 1.7 to a sempron 2600+ nd an asus mobo(A7v400MX). The problem is I cannot install most of the softwares or games not even some drivers(of printer, scanner etc). Many errors ocuurs like "Data transfer error", or "CRC error" or "I/O orror occured". Ive 3 optical drive but the problem occurs on all of them. Ive many images of game CDs on my HDD, which I used to install many times before, but the error occurs with all of them(Virual CD v4, nd v6). Even if I copy the contents of a CD nd then ins tall the same orrors occur. Sometimes the PC self restart also. Ive reinstalled XP many times nd even tried 98 on different partitions but the problem persists. So I dont think it is a software problem. I doubt that the southbridge chip is the reason as it controls all I/O actions. So do I get the mobo to the shop for warranty or some other hardware is guilty??? PLZ help!!!! My config: Sempron 2600+(thoroughbred),ASUS A7v400MX,384mbddr266,MSI GF MX440 64 mb,40+80GB HDD, Benq CDRW, Sony DVD, ASUS CDRW.