Hi again, Merri. Yep, that's what/all it was; dust! We hooked up the compressor, and (gently, of course) blew all the dust out of that sucker, and then I hooked it back up, started it up, and now she's a-running fine...:D. I had first suspected mal/adware, but after running software to check, and coming up clean...well that ruled out that stuff. Last night I got to figuring, and also thought it's been a while since we cleaned out the tower, and dust might be the culprit. Oh, btw, just thought I'd mention that the tower has been sitting on the desk, not the floor. It wasn't as dusty as I thought it would be, but was enough to make it act up.
Sue - who at first thought she was going to have to reformat her HD, and is relieved to know she doesn't...(BG)