I have recently been getting a small box appearing from windows bearing the words "no memory at line 1" press ok and it disappears. I have not noticed any effect on the computer though it has been a bit slow recently. ( I have put this down to BT broadband" Do I need to worry?
Is this when looking at web pages? It's a common error when a web page has a "Flash" video element. Sometimes installing the latest version of Flash fixes this.