go to regedit and search for the key : HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsNTCurrentVersionSL . Than on the right hand you see SkipRearm. change the SkipRearm value to 1. if you have done that you can use slmgr -rearm 8 more times . so if you done the first time 3 times slmgr -rearm than you have 120 days …
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