A 10-15 second period of total unresponsiveness encountered when using a PC running any version of Microsoft Windows. Traditionally occurs several times an hour. Just long enough to become disturbing and annoying, not long enough to inspire a reboot. Generally the mouse continues to move. When the moment ends, the user is usually left to deal with the consequences of the keys they struck in frustration while it was ongoing.
Sure, I'll pull that up right now. Ummm... Dammit, my computer's having a Windows Moment. Hang on.