So I'm new to GOG, and the first two games I bought were Wing Commander 3 and Superhot. I was enjoying both, but I've had separate problems relating to saving in each.

In Wing Commander, saving seems to work fine. I can save, and my files are there whenever I open it, and they even load within the same session. However, whenever I go back to it later, having closed the game and turned off my computer, trying to load my save causes the game to crash. The first time it happened I started a new game, but the same thing happened to that file. I can see my files, but I can't open them.

While I was waiting for WC to reinstall, one of my many unsuccessful attempts to fix it, I opened Superhot, which I'd made it an hour into the day before. Suddenly, all of my progress was just gone. I tried running as administrator and everything else GOG support said to do, but it wouldn't load what I'd done before. I can remember closing the game and reopening it the other day and it loading fine, but once I turned off my computer it stopped loading my save.

I don't know if these problems are linked in any way, but I'd appreciate any suggestions.

Definitely sounds like a defective hard drive.

Did you install them in the program files folder? If yes, install them somewhere else. That might help.

They were installed in program files (x86). I reinstalled them in a folder on my desktop through GOG galaxy, but it doesn't appear to have changed much. Superhot saves fine, but my previous progress is still gone, and wc3 is still crashing. I checked the save files and they don't look like they're encrypted or compressed. I scanned my drive and it didn't show any errors. I don't know how to check which installer I'm using.

Encryption/compression would probably be directory or whole drive level, otherwise it's quite difficult to accidentally do it. Plus it requires NTFS for those particular features.

As for the installer, the filename often helps, if not check the details, it will tell you.