Why does my HP Deskjet F300 out of no where it just stops printing? -

It worked fine one day then i decide to print something now it just says at the bottom right corner 1 document pending. I have tried the trick where you go into run and search that thing and go into printer spool or whatever. I tried unplugging, restarting and refreshing. Whats wrong and how do i fix it!

There s an illustrated explanation of how to clear the print queue here http://www.it-teacher.co.uk/clear_the_pr…