You didn't replace your motherboard, but Windows Update installed a new HAL (Hardware Abstraction Layer). Sometimes, a simple BIOS update changes the SMBIOS table enough that the unlock tool sees a "new" PC.

: The most reliable solution is to wait 12 to 24 hours without attempting to log in on the new machine. Frequent failed login attempts may sometimes reset or extend this timer.

You open the tool, and instead of the menu, you get:

You need to determine if this is a or a temporary local glitch .

If you are locked out, follow these steps to resolve the issue:

Unlock Tool is very sensitive to environment changes. If you are using a Virtual Machine (VM) or certain USB redirection software (like USB Network Gate), the tool may trigger a binding error or a "Security Violation."