Well, I walked into the room today to find Dad was partway thru having the machine reinstall Win7 from the factory-restore partition... Grrrrr.... why does he do these sorts of things without asking me if its a good idea or not first? oO Evidently he was poking around in the machine on his own, looking for something, ANYthing, that would make the machine stop being slow... and it asked him something like "Do you want to restore back to Win7?" and he said "Uh, that sounds like it might work, let me try that." >>facedesks<<
I could have already told him that reverting to bare-bones Win7 from scratch wouldn't fix the issue, since BIOS itself was going slow as heck, too, and that's not even something loaded off the hard drive.
Anyway, it's still running slow as heck. Windows slide out slowly, the animations in Solitaire run in slow motion, etc etc. But now I have to reinstall again all things we'd had in place and configured for years, such as Thunderbird and Firefox and the like. >>facedesks again<<
edited to add: I've gone to the Advanced System Settings from within System and it seems Processor Scheduling is set to Programs, and virtual memory is set to 8174MB. (Visual Effects tab is set to "What the computer thinks....", and Data Execution Prevention tab is set to essential Windows programs only.)
Edit2: I am running the Windows Ram Diagnostics routine now.
Edit3: And after the requisite 2 scan passes, it found no troubles with the ram.