The PowerShell failed to execute successfully because PowerShell is not properly installed.
This may affect some monitoring or discovery.
This can be caused by:
An incorrectly targeted rule running a PowerShell script.
PowerShell is not installed on the target machine.
PowerShell installation is corrupt.
The alert description and context has information indicating which rule or monitor failed. The following link will display all events indicating a failure to run the executable:
View PowerShell Events
After reviewing the error in the context, check:
That the rule is correctly running on a machine where PowerShell should be installed.
That PowerShell is properly installed.
Attempt to run PowerShell.exe.