How to reset windows 8.1 enterprise with no recovery media

[nster]

Hi, I have a laptop with windows 8.1 enterprise, which was given to me by my school and has a ton of crapware on it.

I have now since graduated and fully paid for the computer (so it is 100% mine), however my school has not reset it.

I am the administrator, however if I want to change the lock screen background or some other misc settings I get the message "some settings are managed by your system administrator"

I also do know my product key thanks to a keyfinder program I installed.

Knowing all of the above, Is there a way I can completely reset my computer to factory windows 8.1 enterprise (or better yet, windows 8.1 professional)? I do not care about anything on the machine, I just want a clean install.

Thanks in advanced for all the help!

 

[KYHI]

Make a complete system Backup using marcium> Macrium Reflect Free
then download the eval edition> https://www.microsoft.com/en-us/evalcenter/evaluate-windows-8-1-enterprise
install eval and then enter your full version product key

 

[alphanumeric]

Legally, they are not allowed to resell Enterprise License's. That being said, yes you own the PC but you don't legally have a license for the current OS installed on it. Not making a judgement, just giving you a heads up. Activation could fail at some point if they do an audit. It's either activated by KMS or MAK. If it's KMS it could deactivate at any time. If it's MAK your likely good until you have to reinstall. If you run this utility it will tell you if that PC has an OEM embedded key. Solved Showkey - Windows 10 Forums If it does you could legally reinstall using that key, Windows 8.1 or 10 if you want. And be totally legal from here on out.