This can all be done in the Windows command line for maximum effectiveness or in the Windows Explorer interface for users who prefer to click their way through the process. To use the GUI approach you press [Windows R], type [services.msc] and look for the Print Spooler service. Right-click that service and select [Stop] from the context menu. This will stop the Print Spooler which will make it possible to delete the print jobs in the print queue. Keep the window open as we need it again to start the Print Spooler service.

Now use Windows Explorer to open %systemroot%\system32\spool\printers\ and delete all files that are found inside. Once that has been done it is time to start the Print Spooler service again. This is done in the same menu where it was stopped. a right-click will not show an option to [Start] the Print Spooler service again. All print jobs should be gone and it should be possible to run new print jobs again.

If you prefer the command line you can run the following four commands for the same effect. It is probably a good idea to add them to a batch script.

net stop spooler
del %systemroot%\system32\spool\printers\*.shd
del %systemroot%\system32\spool\printers\*.spl
net start spooler

The script does exactly the same as the manual method.