Click Start: In the Run command type %temp% then ok. It will bring up all your temp files. You can search for any download that may have gone there. When you are finished finding what you need if it's there and moving the files you want to another folder, click edit, select all, then file , delete. You don't need any of these temp files, they just take up space.
I save all my downloads to my desk top and then upload them to an online storage so I can delete the file from my computer. I don't save many files on my computer.