Regshot

Regshot is an open-source (LGPL) project hosted on SourceForge. It was designed and registered in January of 2001 by M. Buecher, XhmikosR, and TiANWEi. Since its inception, it has since been modified and updated countless times to improve its functionality.

The purpose of this software is to compare your registry at two separate points by creating a snapshot of the registry before any system changes or when programs are added, removed, or modified and then taking a second snapshot after the modifications then comparing them.