It’s always a major pain in the ass when you check your printer queue and see a long list of items that never printed because something went wrong. Here is a quick and very easy trick to clean your printer queue, so when you’ve solved the problem, you won’t get all of those queued items.
1. Click Start.
2. Click All Programs->Accessories->Right-click Command Prompt->Run as Administrator
3. Type in net stop spooler and press ENTER
4. Type in del %systemroot%\System32\spool\printers\* /Q and press ENTER
6. Type in net start spooler and press ENTER.
Your printer queue should now be cleaned and ready to go.
Very useful trick indeed!!! 
