I have a server which about 8 times in the last month and a half - 2 months has given me a page fault processor exception in Server.NLM. The monitor screen is frozen at 100% utilization, you cannot Alt-Esc to console screen. It is frozen except to go into debugger. If I do a ?, .r. EIP=CSleepUntilInterrupt, G then the server will abend again with the same error. If I quit out and do a warm boot it will probably happen again within 20 minutes. If I do a cold boot it will not happen again for another 1.5-2 weeks? We have pserver.nlm running on it and that is about it. It is probably 10-15 replicas on it from 4.1, 4.11 servers. Anyway, it is a main server and it brings down 250 users when this happens. We put more memory into the machine about 2-3 months ago and I was wondering if this was the problem. Maybe the memory is bad. What else could be causing this and how can I fix it?