I got that when i was running VC + Google earth on my old PC.
Kingston, You probably have too many programs running at same time.
1. Go to "run" --->
2. Type "msconfig", press enter
3. Click on "Services" tab
4. Check(tick) "Hide all Microsoft services"
5. Do disable all.
6. Press Ok....restart PC.
If you think there is some program that you dont wanna close....just uncheck it from the list.
woot i got more ram xD, thanks for the link Windlord