WhatChanged

Freeware tool by Vista Software that scans the registry and file system for changes between two snapshots. Latest release is from 2010; unmaintained but functional, free for personal and business use.

Get it

The promise

• ✓ No ads
• ✓ No purchases
• ✓ No subscriptions
• ✓ No trials
• ✓ No nagging
• ✓ No surprise bundles

Something wrong?

Reports go to a human review queue. No timeline promised — this is a small pilot, but every report gets read.