Windows 10 / 11 Professional β MAK key with 866 activations left
87XH3-VN9KP-TKBW8-G2BWH-RGDGY
MAKCount: 866 β a Multiple Activation Key, so it isnβt one-per-person. That number is how many machines it will still activate and it only counts down.
Admin Command Prompt:
slmgr /ipk 87XH3-VN9KP-TKBW8-G2BWH-RGDGY
slmgr /ato
Then slmgr /xpr to confirm itβs permanent. Works on Pro β on a Home install the key upgrades the edition first, then activates, and the machine reboots on the way through.
866 left. It was 867.

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