I have a number of servers showing a physical memory usage around 98%. All the servers are 2003x64 standard sp2 virtual machines with 4gb allocated. I have used process explorer and don't see any processes taking more memory than they should. The most any one process is using is 100MB and there are 55 total processes running. I don't see anything that looks strange other than there is no way the sum of all the processes memory usage reaches the 3.9 Gigs process explorer is saying is being used. I have also tried uninstalling the antivirus software but I don't see any significant change other than the memory that was being used by that process is now free. Please help.