I had problems printing to my printer on my desktop machine running Win 10 yet on my Surface Pro that still has Win8.1 the printer worked just fine. Now since I need the printer to print out corporate tax files, I had to solve the problem quickly and reverted my desktop bad to the previous version, Win 8.1. But the printer problem persisted.
I don't know what my brother did to my computer, but IE kept spawning ads no matter what web site I visited, and I had to turn off the audio. I figured out that I could kill the process using task manager.
I reinstalled Win8.1 by downloading the setup media that Microsoft has recently provided. It took me quite a while to find the emails with the keys that I purchased, 3 of them. Guessing which key went to which machine was a 1 in 3 chance of picking the right one. I picked the wrong I found out after trying to authenticate. Easy enough to change the key, which then worked on the second guess.
And every thing is working fine now, printer works, no pop up stuff from IE. I even put Media Center back on, used the key I got for free from Microsoft during the free time period.
So, sorry Win 10 team, I blamed Win 10 for the printer problem and it somewhat wasn't to blame.