Uninstall Windows 10 and Downgrade? Don’t like Windows 10? As long as you’ve upgraded within the last month, you can uninstall Windows 10 and downgrade your PC back to its original Windows 7 or Windows 8.1 operating system. You can always upgrade to Windows 10 again later.
Even if it’s been more than a month, you should be able to perform a clean install of the version of Windows that came with your PC using fresh installation media and its product key.
Go Back to Windows 7 or 8.1
If you’ve upgraded a PC to Windows 10—not performed a clean install, but an upgrade—you have an easy option that lets you revert to the last version of Windows. To access this, hit Windows+I to open the Settings app, click the “Update & security” icon, and then switch to the “Recovery” tab. You should see a “Go back to Windows 7” or “Go back to Windows 8.1” section. Click the “Get Started” button in that section to get rid of your Windows 10 install and restore your previous Windows install.
Windows will first ask you why you want to go back. Just pick anything, and then click the “Next” button. Read More HERE.