My PC recently booted up with the error message "CMOS Checksum Error - Defaults Loaded". I replaced the CMOS battery as I thought that might be at the root of the problem. However, now when the PC boots up it gets as far as Verifying DMI Pool Data and then hangs. Can anyone help with this problem? If it's any help, the screen before, which scanned for devices, stated that there were no devices on the primary master, primary slave, secondary master or secondary slave. I thought this was odd as the Maxtor HD was recognised at the start. My mobo is an Abit KR7A.