Hi all just started using c cleaner after about 5 years my computer is going really slow hence the reason for downloading again. My question is i have a lot of duplicate files come up is c cleaner showing me original file plus duplicates or are they all duplicates i dont want to just press delete in case i mess everything up.
If they are system, or application, files then leave them alone.
System and application files often need more than one copy of a file in different places to work properly.
If they are your own files -videos, photos, documents, etc. the you have to decide which of the duplicates, if any, you might want to delete. Only you can know/decide that.
Deleting duplicate files from the disc is not going to speed your computer up anyway.