ArcMap menus and functions have slow performance after saving or exporting an .mxd file

Description

ArcMap performs extremely slowly after saving or exporting any mxd files. The slow performance can also be triggered after working on an MXD for 1 to 30 minutes.

ArcMap performs at normal speed until the performance issue is triggered. Once it is triggered, the CPU usage may stop around 8 to 20%, even while ArcMap sits idle.

Cause

There is a spyware virus called TSPY_AGENT.DE that is planting .dil and .dat files in the system32 folder.

Solution or Workaround

The solution below may not remove the entire virus, but should restore performance in ArcMap.

Additional solutions can be found on the Trend Micro Web site listed below.

1. Click Start > Search. Search in the c:\windows folder for *.dil files.
2. Right-click the .dil file and select Open Containing Folder.
3. The offending file is highlighted and there is also be a corresponding *.dat file.
4. Either rename the extensions or delete the files, and restart the machine.