My main desktop workhorse PC was having a weird problem. After leaving it idle for a while, Windows Explorer wouldn't respond until I hit CTRL-ALT-DEL to bring up task manager and then it'd behave properly. And for a few days I couldn't figure out what was wrong, I didn't install anything on the system, I wonder if it was a virus or trojan that sneaked in from the other PCs.
Then... just now.. I saw IT.. the SCROLL FORWARD button on the wireless mouse had caved in, most probably due to the fact that WZ or mommy kicks it off the sofa every now and then. I pried the button back out, then did a test by holding the the button. Yup... when the button was held down, Windows Explorer just stops responding.
So... WHY was I experiencing the problem only AFTER the system went idle? I have this theory. On idle without movement, the mouse shuts down then when I wake it up by moving the mouse it sends the FORWARD BUTTON down message constantly to the PC, and when I pressed CTRL-ALT-DEL to bring out the task manager it killed the message being sent to Explorer and thus I regained control.
Hard to believe one stupid button caused so much problems.