When it comes to system cleaners, CCleaner is one of the most popular. However, that doesn’t mean there is no other software with this purpose which is less popular, but with great features. Meet Comodo System Cleaner - a free package of useful cleaning utilities: Registry Cleaner, Disk Cleaner, and Privacy Cleaner.
Apart from the default tools that any decent application with this purpose should have (as mentioned above) Comodo System Cleaner has some nice built-in tools that kept my attention: Force Delete and Shredder. Also, an interesting feature that I’ve found in Comodo is ‘Active Clean’. When this option is enabled, Comodo System Cleaner will scan your system in real-time to identify and delete invalid, corrupt and redundant files when they are created.