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To force reset the DSA:

 
Always back up the whole registry before making any modifications. Incorrect changes to the registry can cause serious system problems.
 
  1. Boot the machine into Safe Mode.
  2. Set the following services to start manually:
    • Trend Micro Deep Security Agent
    • Trend Micro Solution Platform
  3. Disable the Self-Protection of DSA by setting the value of the following registry key hive to "0"

    Hkey_Local_Machine\Software\TrendMicro\Deep Security Agent\Self Protect=0

  4. Search for the following files within the %programdata%\Trend Micro\Deep Security Agent folder and its subfolders. Rename all occurrences of these files or move them from their current location:
    • config.bin
    • ds_agent.config
  5. Boot the machine in Normal Mode.
  6. Start the Trend Micro Deep Security Agent service.
  7. Run the following command to reset the agent:

    dsa_control.exe -r

Optionally, you can uninstall the DSA using the Control Panel's Add/Remove Programs option. If the process fails please uninstall using the steps detailed on this KB article:Manually uninstalling Deep Security Agent, Relay, and Notifier from Windows.