An error occurred starting the process monitor on the target computer. The process monitor is used to gather information about processes for display on the process panel in PDQ Inventory.
The process monitor failed to start for a number of possible reasons. The error message returned should have more information. The message "Unknown error" indicates that the process didn't respond to the start command in a timely fashion.
The event log on the target computer will likely contain additional information about why it failed.
Generally this error indicates a problem that PDQ Inventory doesn't know how to handle and the best option is to contact Admin Arsenal support.