So below are the steps to remove activation key from the system: See below URL for activation issue error code and details: Like “you have reached multiple activation limits” or “Unable to activate the windows with entered key.” Like if we are using OEM OR Multiple activation keys and doing above without following the same. If we are a formatting system or removing before the license, it may cause you to activate the system back with same License key. This is very important for any admin to make sure before formatting any of system remove license which exist It will work for window operating system all versions. This is about how to Reset or Remove Windows Activation/Remove license key using a command.