Regarding the recycle bin.
Is it CCleaner that is finding files there every time, - but if you actually open the bin there are no files in it?
If so then you have a corrupted recycle bin, it’s fairly common and easily fixed see the second half of this:
Sometimes it finds a lot, sometimes very little
It is normal to keep finding files to clean if you run CCleaner 2 or more times at once.
When CCleaner clears files by deleting them sometimes Windows will recreate them as empty files straight away, so CCleaner finds them to clean again.
For some files CCleaner will empty the file without deleting them, so it will always find them to empty, even if they are already empty.