Wipe free space function

I was running the wipe free space thing on ccleaner, then my computer just suddenly froze up and i had to restart it without canceling ccleaner. Before i ran it i had 200 gbs free space now i have 80 gbs. Can you tell me how to get my 120 gbs back? I'm guessing you have to delete the file ccleaner created, but i have no idea how to find it. :(

It should be at the root of C drive and have a long random name.