Manually Uninstall TruGrid Sentry Service

In case you have to manually uninstall/unregister the Sentry service, below are instructions.
Go to Services and verify that the TruGrid Sentry service exists
Disable the service
Go to an Administrative Command Prompt
Run the command: sc query trugrid_sentry
Verify service exists. See below example of results.
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Run the command: sc delete trugrid_sentry
Go to Services, refresh and verify the TruGrid Sentry service no longer exists
Install updated version of TruGrid Sentry Agent
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Reference:
Microsoft SC.EXE Documentation
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Updated on: 03 / 05 / 2020