Returnil System Safe Free 2011 is a free PC security suite based on a premium software package. It includes the basics, including virus and malware protection and its Virtual Mode feature, a virtualization technology that isolates your PC from threats. In addition to the reduced-function free version, Returnil is also available as a fully functional 30-day trial version. The free version lacks features such as the automatic system rollback feature, remote online management, and free technical support. More significantly, it disables the File Manager that lets users save files and make changes to their main system from inside Returnil's virtual system. That means you can surf the Internet and use your PC safely, but you can't save any work you do in Virtual Mode.