What is cclener?

Answer 1

I assume you mean CCLEANER (aka crap cleaner).

From the website

"CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your internet history. Additionally it contains a fully featured registry cleaner." http://www.ccleaner.com/

Theres not much to add really. It attempts to optimise your computer by removing temporary files and looking for unused or erroneous entries in the registration database on a Microsoft Windows operating system PC.

Chris Neary Bsc hons FdSc