Agreed. If that has the original drive or drives, they're probably on their last legs as well. It may simply be time for an upgrade or replacement, unless you want to invest in a new drive and GPU card. That wouldn't be the worst idea though as they could be repurposed to a newer machine at any time you decided to do so. I'd think that OEM 5 year old power supply is probably getting tired as well, and could even be contributing to your problem.