I run an HP Brio with 64mb of RAM. Several times lately I have had a message saying that system resources are very low. A check with MemTurbo says that I have anything from 7 to 15mb of RAM free. I have First Aid 2000 which doesn't say anything is wrong, and I use the McAfee Clinic to clean out unwanted files, which it does very efficiently. The computer seems to be running on its own, clicking away merrily,when I am not using it so something presumably is running and using a lot of memory. But why does it show low resources when there is RAM available?