Computer is less than 6 months old, and the problem apparently began right after I installed a diagnostic tool... Runs in Safe mode, but only in pure Safe mode; Safe Mode with Networking does the ever-repeating error box, just like normal mode does. The machine is typically used in Limited-User mode (If it's possible to do Power User accounts on MCE2005, I haven't managed it yet) so I'm understandably puzzled.
Window Title: Windows Product Activation
"A problem is preventing windows from accurately checking the license for this computer. Error code 0x80090019."
Must not reformat, due to irreplaceable data aboard, so that eliminates destructive System Recovery via PCAngel. :sigh:
Machine came with a System Recovery DVD, however, so it is possible that Repair Mode is available. Would not count on it, though. Am currently checking with SpySweeper for malware, although I expect that isn't the problem at all.
NOD32 and SpySweeper both give the thumbs up; no infestations.
Edited by R. Danner III, 30 August 2006 - 06:20 PM.