This isn't the first time it has happened, but now that I clean installed the new Windows, I'd like to have everything neat and sparkling. Unfortunately, these files are in the way of achieving that. I'm not sure what's causing them, but so far, the only major software I've installed are Steam and Photoshop. I think it's Photoshop's fault, but as I said, I'm not sure.
What I want to know is what these things are, and more importantly, if I can delete them.