What is appnhost.exe? - Native Host for Apps is a small yet powerful native application that can communicate with apporved apps like Click&Clean and provide them the functionality of desktop applications. This allows you to get unique and powerful features right in your favorite apps, which usually have limited capabilities due to a browser sandbox.
To install "Native Host for Apps" on this page, choose the "Install AppNHost" button, click on the file in the downloads panel and click "Run" button.
NOTE for Windows 8 users: your OS includes a "SmartScreen" filter that may attempt to block the installation. If so, choose "More info" and then "Run Anyway".