Whoa, now that's a trip down the lane. I've seen it too!
But only in veeery old Windows, think Win95B or the like.
It happens sometimes, even in the present day: almost certainly it means something leaked and hit 9999 GDI objects (or user objects?) -- you can add those columns in task manager. Killing the offending process should fix it
alt Hacker News
It happens sometimes, even in the present day: almost certainly it means something leaked and hit 9999 GDI objects (or user objects?) -- you can add those columns in task manager. Killing the offending process should fix it