Related to the problem that I posted about here: https://www.techspot.com/vb/topic141683.html, this is a little more urgent. The Compaq will frequently, sometimes regularly lock up: screen freezes, neither mousepad nor keyboard respond, and the harddisk parks the heads. Lately, it locks up when it's on the charger, and then is fine (at least, so it seems) when on battery-power. It's also sensitive to being touched--not bumped, it's that unpredictable. Sometimes, I can move it around without problem, other times, if I even touch it, it freezes. The fans still run like normal, so I don't think that it's overheating. I'm afraid it's a motherboard issue, which I wouldn't be surprised at, considering that it's about 6 years old. Any suggestions would be much appreciated.