I flashed Edge E420 Bios to Edge E520 1143-AEU, same Bios. After 30 days, the Windows is non genuine message shown. I installed fresh Windows 7 Professional and OEM activated through internet, the UEFI Bios does not activated with offline status. I don't know why ?
In this case, could you make/upload RWE reports and backup of the BIOS from both PC - with Win7 and with DOS pre-installed, please?