I periodically get a window which indicates that "ESET GUI has stopped working. Click to find solution online and restart, or click to restart." I cannot find any pattern as to when this happens. As a matter of fact, in this most recent case, I was away from the computer for about an hour, and when I came back it had that error. I am running Windows 7 Professional 64-bit. No other security/malware/firewall software is installed. I am running NOD 32 Antivirus v4.0.474.0, and the Windows firewall. Windows Defender is turned off. Any ideas on how to troubleshoot this or what may be causing it?