Then reboot. You will need a genuine key.
slmgr /upk slmgr /ckms slmgr /rearm
While this fools the licensing service into showing “Activated,” no genuine product key or Microsoft authorization is ever involved.
If you manage many computers, buy (Windows or Office) from an authorized Microsoft reseller. You will get a genuine KMS host or MAK keys – no cracks needed.
Open Task Scheduler → Look for entries named AutoKMS , KMS_Renewal , or gibberish names running %windir%\temp\* → Delete them.