Comodo System-Cleaner

I just downloaded Comodo System-Cleaner ( Free ) which came in Rar Format.

My question is how and where do I install it ?

I already have COMODO Internet Security installed.

You will want to download this one.

http://download.comodo.com/csc/download/setups/CSC_SETUP_2.1.114194.1_xp_vista_server2003_win7.exe

The one you downloaded was the Portable version of CSC.