I have 1Gb of RAM in a Pentium D 3.4 Ghz computer thats less than 2 years old. I'm running an up to date copy of Windows XP Pro, and Office 2007. The server is Windows Server 2003 - also up to date.

ctrl-alt-delete was not working - it froze completely. Even the clock stops. I've changed the network card and tested connecting directly to the same switch as the server, and it has still frozen. Other workstations go through 3 switches to get to the server, but are working better.

I've reduced background tasks and run System Mechanic to clean up my system. I think this has reduced the frequency but the problem is still there.