I have a PC that keeps getting frequency out of range error that shuts the PC down. It is the "server" for a peer-to-peer network working with two other PCs. I have eliminated wiring in the wall, two-way radios near the monitor, and PC speakers near the monitor. I started out with a Dell Optiplex PC with a generic monitor and swapped the monitor with a Dell brand monitor. Then I swapped the hard drive into a Micron PC. The error seems to be triggered by dialing into the PC through PCAnywhere where the PC is in host mode. The PC uses McAfee antivirus.