Every day at about 10:45 AM central my Windows 7 computer at the office grinds to a halt, and trying to use the computer is an exercise in absolute frustration. Windows are slow to gain focus, tabs don't change, even typing has a delay that I haven't seen since typing on a BBS with a 300 baud modem decades ago. The weirdest part is that when I try to alt tab to a different application during this, the window I'm trying to get to will actually completely disappear (showing the desktop underneath) for a couple of seconds then reappear as if nothing was wrong. Sometimes the entire monitor goes black and starts to redraw a little bit at a time.
Task manager shows svchost.exe sucking up 800+MB of RAM (on this paltry 1GB system). Even listing the processes and services by PID, it's impossible to tell what's going on, the PID of this svchost.exe process is listed on 15 different services: wuauserv, winmgmt, themes, shellhwdetect, sens, schedule, profsvc, mmcss, lanmanserver, iphlpsvc, ikeext, gpsvc, browser, bits, and appinfo. I'd like to say that I assume it's Windows Update causing this (isn't it always?), but windows update is scheduled to download and install updates at 3AM (and the computer is left on overnight), so either one of those other services is going haywire or Windows 7 hasn't got a clue what time it is.
Any ideas on figuring out what's going on, or is it time to give this thing the ol' reboot reformat reinstall?