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How to activate Windows 7 without a Product Key

Easily activate a Windows 7 PC with only a few commands and no product key.
  1. Run the command prompt (CMD) as Administrator (by right-clicking).
  2. Enter slmgr -rearm in the command prompt.
  3. Restart the PC.
  4. After restarting, re-run the command prompt as Administrator.
  5. Enter slmgr -ato in the command prompt.
  6. The message Successful activation of Windows 7 should appear.

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