I just downloaded version CCleaner 2.14.750 (Standard Build), and ran it. The program runs and deletes the files, but afterwards I got an error message on my system tray (in a traytip) with title "CCleaner.exe - Corrupt File" and said "The file or directory C:\Windows\Temp\9wn35dl8.TMP is\ncorrupt and unreadable. Please run the Chkdsk utility." (with "\n" being the newline character)
I ran CCleaner multiple times, without restarting, and the same error popped up, with the same file beng corrupt/unreadable).
Below is a screenshot of the error.
update:
I downloaded the portable version and got the same error (same file name and all).
The traytip pops up while the files are being cleaned, not afterwards.