Originally Posted by
DanK
Whoa! We are way ahead of the game here, talking about steps as severe as a reinstall.
The first necessary step is to figure out what is taking up so much space. This is hard to do if you don't have the right tools, as the Windows explorer doesn't make this easy.
I have used CCleaner for years on multiple computers. I suggest you do this. I don't think it will solve your problem, but it will get rid of some junk and make it clearer what the problem really is.
You haven't said what brand of computer it is, but some come with a lot of unwanted software. You can look at the start menu to see what is there. You can google the programs to see what they are. You can uninstall things you don't need, but don't uninstall anything you can't identify, and don't try to uninstall key part of windows, such as edge and cortana, even if you won't use them.
If it turns out that you simply have too much software on the drive, then you can simply uninstall something and reinstall it on the physical hard drive.
Re the photos you deleted: it may depend on how you got rid of them. If you simply delete files, the sectors those files used are freed up. However, I don't know how PSE works. It may well have kept preview files and other stuff. You could poke around the PSE directories to see, but unfortunately, as I have never used PSE, I don't know what it's file usage is. I would expect any files like that to be in one of two places: under the program itself, which would probably be in C:\Program Files\Adobe but possibly under C:\Program files (x86)\Adobe, or in your user area.
If PSE turns out to be the problem, just uninstall it. If it asks you whether you want to remove files, say yes. After it is uninstalled, you can poke around in those same areas to make sure nothing is left behind that you have to delete manually. Then reinstall it.