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During uninstalling the Windows Agent we detect several times the following messages:

We analyze this further and noticed that this is happening, if you remove the following files:

  • C:\Windows\Installer\ .msi
  • check-mk-agent-1.x.x-xyz.msi

Windows can't uninstall the Checkmk Agent if both files are missing from the system. So please don't remove both files.

If you're using the Agent Bakery, please keep in mind that for restoring you need the Agent from the bakery with the same hash as previously installed on the system.

If you delete both files accidentally you need to follow these steps for uninstalling the Checkmk Agent succesfully.

Step-by-step guide

  1. Remove the corresponding Registry: Computer*\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Check_MK_Agent*

  2. Stop the Checkmk Agent Service

    net stop Check_MK_Agent #(for CheckMK Agent 1.5)
net stop CheckMKService #(for CheckMK Agent 1.6)
  3. Remove the Directory  "C:\Program Files (x86)\check_mk"
    1. In Control Panel "\Programs\Uninstall a program" you will find one deprecated entry for Check_MK Agent
  4. Download the troubleshooter for removing this entry:
    1. https://support.microsoft.com/en-us/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed

    2. Uninstall CheckMK Agent with the troubleshooter

  5. Reboot



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