It is also possible to save Avira Registry Cleaner to a USB flash disk or similar storage unit, in order to run it on any computer with minimum effort and without previous installers. Since installation is not a prerequisite, you can drop the executable file to any location on the hard disk and just click it to run. A portable application that removes leftover registry entries It contains an intuitive configuration set that primarily caters to advanced users. Avira Registry Cleaner is a lightweight and portable software application that scans the computer for registry key leftovers of Avira products in order to eliminate them completely, permitting you to proceed with a clean reinstallation.