Click For Sale is a browser add-on that provides and modifies your browser's behavior. It installs and uses the browser to annoy you with ads and linked words. Users considered that this is adware and it should be removed as soon as possible. The program/add-on might have come bundled with other application. To remove it use Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
AdwCleaner will make sure that the add-on will be wiped from computer completely.