How do you downgrade back to windows 8?

I have recently upgraded to windows 10 but i prefer windows 8 when i try to go back to it windows says "were sorry but you cant go back" plz help

Sounds like you are going to have to clean install Windows 8 to go back to it.

Go to settings, update and recovery, recovery, and go back to Windows 8.1.

Please note, you only have 30 days after upgrading to Windows 10 to revert back to your previous OS. After 30 days, Windows 10 deletes the file that allows you to start the downgrade process.

If its not allowing you to revert before the 30 days, chances are that the "Previous Windows Installations" aka the Windows.old folder, either got deleted, or got corrupt during the upgrade.

Unfortunately, that would only give you the option to back up all of your files, and reinstall Windows 8.1.