ARU filename extension is used by malicious files that can infect ARU Windows systems. Presence of such files on user’s system should prompt users to immediately scan their system for malicious software. ARU files are typically named Autorun.aru and contain malicious data.

ARU files infect computers through Windows Autorun function. Any antivirus software should handle such files without a problem. If ARU file or files have been detected on user’s system, it is advised that user run a full scan for malicious software.