Removing a Windows 7 Registration Key

I was recently writing about setting up a VM with my development environment that I could hand out to other developers and how one of the challenges was removing the license keys. This post will be a continuation of that process, this time we’ll be resetting the registration in Windows 7 so that the next time it boots up it will request a registration key just like it was it’s first boot.

First, open command prompt as an Administrator and enter the following commands:

  1. slmgr /upk
  2. slmgr /cpky
  3. slmgr /rearm

After that you should almost immediately be prompted to enter a new registration key, just click Activate Later and it will continue to pop up periodically until you are ready to enter a new key.

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