November 08, 2013
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HP Printer showing a door open warning when it is not

HP Printers sometimes notoriously show warnings like the ‘door is open’ and stops printing documents when it isn’t actually open. This, no doubt, could've been an ongoing source of frustration. This is how you can tackle that. And yes, without downloading a thing.

Am currently using Windows 7, but if you play around, you’ll discover for yourself on how to do that on other versions. The problem is chiefly due to the fact that your Print Spooler isn’t responding. Restarting the service should solve the problem.

The steps:
  1. Unplug the printer first (this is important).
  2. Open up the start menu and type in "services" without the quotes. Press Enter key.
  3. Wait for the services pane to open.
  4. Find Print Spooler in the list and (single) click on it.
  5. On the left, there will be a link to restart the service. Click on it. When the service has been successfully restarted, the printer should start working.
Update (Steps for Windows 8.1):
  1. Hit the Windows key to bring up the start screen. Start typing "services".
  1. Next, find print spooler and click on the link to the left to restart the service.