Reason:1. Verify internet connectivity; genuine activation requires an internet connection, preferably via Ethernet cable.
2.Confirm that the customer’s reinstalled system matches the version indicated on the genuine product code label.
3.If manual activation fails, proceed with command-line activation or telephone activation.
ວິທີແກ້ໄຂ:1. Activate using an Ethernet cable. If the cable fails, switch to command-line activation.
2.Our factory-installed system uses the 2019 Edition 1809 version with its corresponding activation key.
If customers reinstall the system, it must be the 2019 Edition 1809 version. Installing the 2021 Edition 21H2 will cause incompatibility and prevent activation.
ໄດ້ 2021 21H2 version is rarely used. Its activation code differs from the 2019 version. Microsoft’s 2021 21H2 system currently contains bugs.”
