Thank you for posting this solution

. Microsoft's "Cancel All Print Jobs" button is a Charlie Foxtrot. Having to start and stop services and delete files in obscure locations leaves me with a headache imagining they hired Lindsay Lohan, Kim Kardashian and Snooki as half vast programmers in Redmond.
If it weren't for nice guys like you, I'd have documents sitting in queues for another 10-months --for half a dozen printers that don't exist anymore. What should be intuitively obvious to the most casual observer ain't even close.
This is an example of why everybody is moving towards Apple Macs/iPhones and Google/Android and LAMP
Call me an anachronism if you want, but this has gotten worse with Windows 8. Every basic action now requires a Google search. I'm booting up in Chameleon Hackintosh and Ubuntu more and more often now because the learning curve is not as high, steep or laced with as many crevasses and avalanches.