The reasons I think your copy is hacked/pirated are that a) you shouldn't be seeing this on Windows 10 Home, b) it sounds like you're not using a system provided by an organization, so there's no legitimate reason your Windows system should be a KMS client even if it was running Pro, and c) there are some Windows activation cracking utilities that involve running a KMS server emulator on the system itself and configuring Windows to check in with that emulator, because in theory that would allow the system to remain activated forever without ever needing a product key or having to check in with a real KMS server. However, KMS activation is only supposed to be used for Pro, Enterprise, Education, and Server versions of Windows, because organizations don't use Windows 10 Home - and it can only be used in companies that have at least 25 systems. Instead, they just need to maintain a licensing server, and if Microsoft ever audits that organization's licensing usage, they can just check the company's KMS server. The benefit of KMS activation for organizations is that they don't need to use or track product keys on individual systems when they deploy or retire them.

If the system stops being able to do that, perhaps because that system is no longer being used within that company, then Windows falls out of activation.

As long as the system continues to renew that license by checking in with the organization's activation server periodically, everything runs normally. When a Windows system configured to be a KMS client checks in with the configured KMS server, it receives a temporary license to run Windows on that system for 180 days. Instead, they deploy their own internal activation server, called a KMS server, and then they configure their deployed Windows systems to check in with that activation server in order to activate. Basically, the way it works is that large corporations have the option activating Windows in a way that doesn't involve using product keys at all. In terms of why I think that, the organizational activation service is called KMS (Key Management System) activation. My guess is that if you went to, entered your Service Tag, and looked up the Original System Configuration, you will find that it originally shipped with Linux or a previous version of Windows and therefore isn't licensed for Windows 10. Fabroneyou have a Windows 10 Home system that says it's activated by 'your organization's activation service'? I'll provide the details below, but the short answer is that it sounds like whoever sold you that system put a hacked/pirated copy of Windows 10 on it.

Win 10 pro product key 2018