I am having a problem. I looked at my dads PC about a week ago and decided to reformat it. After the reformat it started to freeze at the'checking NVRAM' part. As well as this, following a couple of restarts both drives, a cdrw and a dvd, disappeared out of 'My Computer'. I cleared the CMOS which appears to have sorted out the freezing at the NVRAM but the drives are still missing. Can anyone give me some advice?