Would You Please Help Me Remove Shady Software from the Steam Deck That Wasn’t What I Thought?

JohnF

Hello Steam Dexperts,
Would you please help me remove shady content that I installed on my Steam Deck before realizing it was not what I thought? Should I factory-reset my Steam Deck to remove this shady software, or is there a less-dramatic solution? 
I recently got a Steam Deck OLED, and I love it! I wanted to play my legally purchased Epic Games Store copy of Hogwarts Legacy on the Steam Deck with the Heroic Games Launcher, but it wasn’t launching and running with any version of Proton or Steam Runtime. 
I found a top-results YouTube video from Grown Up Gaming called “Can I install Hogwarts Legacy on Steam Deck?” It directed me to a Hogwarts Legacy Steam Deck fix by pdxrico on GitHub. Without stepping back and thinking it through, I downloaded the ‘fix.’ I let it use my sudo password and make a change to the Grub. 
I then found out that ‘fix’ was shady and not intended for my legally purchased Epic Games Store copy of Hogwarts Legacy. I would like to remove this shady ‘fix’ from my Deck and undo its change to the Grub. Should I do a factory reset, or is that more than what’s needed? Could I change the sudo password and enter a command to revert the Grub to its previous state? I have fully uninstalled Hogwarts Legacy and deleted this ‘fix,’ but I don’t know if that removed the shady software entirely. Obviously, I should have stepped back and thought this through before installing this ‘fix.’ Lesson learned. 
Thank you for any advice you can offer!

PaulL

Hi! I would personally say a factory reset is going to be easiest here even if you have to take a bit more time reinstalling everything… The Steam Decks use SteamOS which is based off of Linux. The support for it is extremely limited.

JohnF

Thanks, PaulL. It sounds like a factory reset is probably a good way to go.