Hi, thanks for reaching out to our community. We're sorry about the error you have experienced. Our product team is aware of this issue. So far our investigations (as well as this and other threads) show that adding CCleaner to the exception list of your anti-virus should solve the issue - so far this has worked for Trend Micro and Virus Buster.  Or, as suggested above, downloading an older version of CCleaner.    We are urgently continuing to investigate this and appreciate your help wit