How easy is it to revert back toW8.1 after W10 upgrade?

To the OP's original question, I just reverted from Win10 back to Win 8.1. As mentioned previously it's under the settings option and clicking on the revert back to 8.1 option took less than 5 minutes and everything is working just fine. I actually thought I liked Win10 quite a bit but I was having a couple of minor issues so I thought I would go back and see if they were related to the update. It turns out the Win10 was slowing down my browsing and I had not even noticed until I returned to 8.1. Going back also resolved the issues I was having so I will be staying with 8.1 for the near future. Just had to go in and hide the Win10 update in the Windows update page.