My windows 2000 machine has been popping up with this message when I try to run processes about 2-3 minutes after starting up. Before this time elapses, it works just fine. After the 3 mintues are up, i can no longer start many programs, copy/paste files/text/pictures, even bring up a search dialog box in IE. Interestingly enough though, if I start say windows media player just when the computer starts up, I will be able to run and play ANY video/audio file without warning. However, close media player and start up again and I get an "out of memory" error message.
Now, I have 768 mg of ram, not to mention 110GBs of free space (so i'm not running out of virtual memory). When I check the task manager it claims that I am not using more than 70~100 mb of memory (and this is before I shut down any non critical processes). I've played around with the BIOS settings to no avail.
I've reformated my entire machine twice and I still get this message. Incidently, it has also been appearing on other computer in my network (also 2k machines). I'm thinking virus, but I haven't found anything to substantiate this (or anything on the web that might help). I've run a full virus scan with the latest updates from pc-cillin I came up empty.