Basically any of the old app back programs on phones just packs them back into APKs and stores them
Just search for something like APK backup or app backup on the Google Play store and you will get hundreds of working results usually the hardest part is just finding whatever bullshit folder they decided to shove them in
I mean I've literally never had windows fail for something that wasn't ultimately my fault but still to keep safe I just keep my main OS and games on my M2 SSD and everything else goes on regular SATA SSDs or HDDs in my system that way if somehow windows does get completely fucked to the point where I can't fix it I can just wipe that SSD and reinstall Windows and its games without worrying about my data on the rest of the drives being affected
And of course all my important files are backed up to my NAS and/or Dropbox
Basically just delete everything but the "users" folder And of course any folders you created yourself