Hi,
Receiving Start PXE over IPv6 usually means that the HDD of your PC is not being recognized by the BIOS, which is why you are unable to boot into Windows. We suggest that you reset the BIOS settings to default, and then try to boot into Windows. Should you need assistance regarding the BIOS, kindly get in touch with your device manufacturer.
Do get back to us once you are able to boot into Windows.