If you use a loader, the SLIC certificate is loaded before windows starts and is impossible for microsoft to detect or disable it. This is the same as what OEM computers with serial key labels/COA label use.
If you use KMS, windows will connect to a fake auth server and activate itself. It adds KMS routine to Windows Task Scheduler, which can be removed and after 180 days from last connection (to the fake server) Windows will deactivate itself.
Both methods will work, and doubt microsoft detects these with updates.
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