Change machine GUID

A small open source app for randomly altering this well-known registry key on Windows.

When you run this program, it changes the value of HKLM\Software\Microsoft\Cryptography\MachineGuid in the registry to a new random GUID. If you're on 64 bit Windows, both the 32 bit and 64 bit version of the registry key get changed and the two versions get set to different values.

This page was first published on June 2, 2021, last revised on June 2, 2021, and last republished on June 20, 2021.