Windows only: Ariolic Disk Scanner scans your hard disks, flash drives, CDs and other removable media for errors—but it doesn’t fix them if it finds them. Completely portable and lightweight, Ariolic makes quick work of locating disk errors via read-only scanning, which is perfect for performing a quick disk check if IT lockdown or other circumstances render Windows built-in Scan Disk unavailable. Ariolic Disk Scanner is a free download for Windows only.