virtual memory is a place on your hard drive that the system uses to suplement your RAM....
Info on Virtual MemoryHow to increase the Virtual Memory allocationusually when your computer starts telling you about virtual memory issues out of the blue it's indicative of a different issue...usually ram issues
go to
http://www.memtest.org/ and follow their instructions to make a bootable memory test disk and run the test
or you can go here
http://oca.microsoft.../en/windiag.asp and get the microsoft ram tester
either of these is fine as they do the same job...run the test a few times and report any errors with your next post
you may also want to run a chkdsk and defrag your hard drive
to run chkdsk open up "my computer", right click on your hard drive and choose properties, then choose the "tools" tab, press "check now", make sure both boxes are checked and press ok...it will probably tell you that it can't run untill the next reboot...say ok and restart your computer (if you have any other hard drives...do the same to them as well)
to defrag open up "my computer", right click on your hard drive and choose properties, then choose the "tools" tab, click the "defragment now" button, click the defragment button.... this process takes FOREVER on most drives especially on large, highly fragmented drives...you will probably want to run it at night when you're not using the machine...you'll probably also want to disable your screen saver and your antivirus software (if you've got a broadband internet connection you might want to disconnect it from your computer while your AV is turned off)