Ethereum Noob from 2016

I mined 5 ethereum back in 2016 on an old PC and I have the files from that old PC but I cannot for the life of me figure out how to access the "coins" stored in my wallet. I had the wallet code and looked it up but it says I have a 0 balance. Is it possible that someone took them? Is it possible that I have the data stored locally and that I need to reconcile the local data with the online data? Straight up, I have no idea how this works. Do you know of any possible programs I may have used back in 2016 that I could download to access this data?