Here is a step by step guide showing how to manually clear print jobs that sometimes get stuck in the print queue or spooler.

The screenshots were taken in Windows 7 but this guide may also be applied to other Windows versions.

Open Control Panel (All Items View)

Run services.msc in one of two ways:

• Click on Administrative tools and then double-click Services
• Open Start Menu. Type services.msc and press Enter
  

The Windows Services console will open. Scroll down at locate Print Spooler.

Right-click on Print Spooler. Press stop.

Using Windows explorer delete all files currently in the printer queue. You will find the files in C:\Windows\System32\spool\PRINTERS. Where C is the drive letter of your operating system.

The last step is to go back and start the Print Spooler service.

Done. You have now cleared all stubborn print jobs from the queue!