Local Windows check, we sometimes get "UNKN - Item not found in agent output"

Troubleshooting
8

That would be strange. If you have only a write-host this should work everytime.
How is you default agent settings configured?

I had only one systems with problems with plugin execution, there it was only the agent updater blocked by the anti virus software :smiley:

I add my default config if i have no agent bakery only as reference if you want to compare.
Such config runs on some thousand hosts in my systems.

global:
    only_from: MON-HOST-IP
    async: yes
    sections: 
        - check_mk 
        - spool 
        - plugins
        - local
        - winperf 
        - uptime 
        - systemtime 
        - df 
        - mem 
        - services 
        - msexch
        - dotnet_clrmemory
        - wmi_webservices
        - wmi_cpuload
        - ps 
        - fileinfo 
        - logwatch 

ps:
    enabled: yes
    use_wmi: yes
    # full_path: yes # only if needed

winperf:
    enabled: yes
    counters:
        - 638: tcp_conn
        - Terminal Services: ts_sessions

logwatch:
    enabled: yes
    logfile:
        - 'Application': warm nocontext
        - 'System': warn nocontext
        - '*': off

plugins:
    enabled: yes
    execution:
        - pattern     : '$BUILTIN_PLUGINS_PATH$\windows_updates.vbs'
          timeout     : 3600
          async       : yes
          cache_age   : 90000
          run         : yes

        - pattern     : '$BUILTIN_PLUGINS_PATH$\mk_inventory.vbs'
          async       : yes
          run         : yes

        - pattern     : '$BUILTIN_PLUGINS_PATH$\windows_if.ps1'
          async       : yes
          run         : yes

        - pattern     : '$BUILTIN_PLUGINS_PATH$\windows_tasks.ps1'
          async       : yes
          run         : yes

        - pattern     : '$CUSTOM_PLUGINS_PATH$\*.*'
          async       : yes
          timeout     : 30
          run         : yes

        - pattern     : '$BUILTIN_PLUGINS_PATH$\*.*'
          timeout     : 30
          run         : no

        - pattern     : '*'
          run         : no

local:
    enabled: yes
    execution:
        - pattern     : '*.*'
          run         : yes