What Changed - Version 1.0 A combination disk backup and system monitoring utility for Windows 95 or NT. It enables you to take a "snapshot" or record of the contents of your hard disks and compare them to your hard disk files in the future. You can automatically back up any files that have changed or been added to your hard disks. You can also find any changes that might account for any problems you have developed with your system, such as corrupted or missing files.