I tried to install YAC --- Yet Another Cleaner ---- after I read a very favourable review on the Softonic website. However, it kept disappearing after every download which eventually I traced to the fact that it was automatically being moved to quarantine by Malwarebytes. When I queried this I was informed that it was a rogue program with a dodgy history and undesirable features, despite the fact that worldwide large numbers of people use it.
One source says: YAC is essentially considered a non-beneficial Windows Optimizer and Antivirus by reputable security experts. The program is known to perform fraudulent computer scans in order to create customers and collect personal user information.' For full details see the following two links:
The second article, besides condeming YAK, gives thorough guidance on different ways to uninstall it. It seems it has a tendency to hang around even when no longer wanted.