F-Secure Email and Server Security manual scan causes system to hang

This discussion has a more recent version.
Khairul_A Posts: 272 F-Secure Employee


After initialing a manual scan, the server/system experiences noticeable degradation in performance causing the server/system to hang.


Scanning large archives may cause the CPU usage to increase by 50% - 100%.


To overcome this issue, set an archive nesting limit for manual scanning:

  1. Start Windows Registry Editor (regedit.exe).
  2. Set the following registry on the server:
    • If you have a 32-bit system: [HKEY_LOCAL_MACHINE\SOFTWARE\Data Fellows\F-Secure\GKH2] "MaxArchiveNesting"=dword:00000001 (1)

    • If you have a 64-bit system: [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Data Fellows\F-Secure\GKH2]"MaxArchiveNesting"=dword:00000001 (1)

  3. Restart the FSGKHS service for the change to take effect.