Unable to open parallel port LPTx. Please make sure that no application is currently using this printer port, also make sure that no printer is using port LPTx. You might have to restart the service after the resource conflict is solved.
You will get this error if EventSentry is unable to open the configured LPT port.
You will need to make sure that no printer or other application is configured to use this port, and possibly stop the spooler service by typing
net stop spooler
in the command line.