@JJG whilst writing my reply to your post I realized I have my old hard PC tower from years ago still standing here hardly a few meters away from me in my office.
I am 100% certain there's BTC (and probably also LTC) mining software on this drive. I am however not 100% certain if there's any BTC or LTC on this thing and - even though it's been years ago - I'd probably remember.

Internet at the student dorm was a pain in the buttocks at that time.
Now how am I going to bring this dinosaur alive on a MX Linux laptop...


I won't get my hopes up too high, but damn wouldn't that make a great story.