Delete print queue

1. Open Command Prompt as Administrator:
   Click the Start button, type cmd, right-click on "Command Prompt" and select "Run as administrator".
   
2. Stop the Print Spooler Service:
   Type net stop spooler and press Enter. 
   
3. Delete the Print Queue Files:
   Type del %systemroot%\System32\spool\printers\* /Q and press Enter. 
   
4. Start the Print Spooler Service:
   Type net start spooler and press Enter.