Lately I have been experiencing freeze-ups on a consistent basis. I have taken the following troubleshooting measures: Opened up my pc and removed whatever dust may have been there that may have caused the graphics card to stop working; have checked my Event Viewer for Errors and nothing really significant there to be a cause for alarm. What other troubleshooting measures can I investigate to find out what is going on? This is a 6 1/2 year old Dell Server.......I am running 4 GB RAM on it and I am beginning to wonder if the extra memory may be causing the problems? Should I go back to 3 GB of RAM to have some on-going stability?