I'm pretty sure the original lab doesn't require admin rights, haven't checked out the remake though, I'm using windows 8.1, no antiviruses installed, I'll install the itch.io app later to see if it has the same problems, still thank you for your effort and feedback
I dug out my old win8.1 tablet (maybe it wasn't wasted money after all :)
and managed to reproduce the problem with the guest user
The app seems to be the workaround: I had no trouble installing the app and starting it with that one; did it work on your end?
(also I hid the old versions because the app was preferring them for some reason)