PC has an unsupported disk layout for UEFI firmware error for Windows11 upgrade ?

[ReprobusR]

I'm trying to update Windows10 to Windows11, without loosing any data but I continue to get this error; Windows can't be installed because this PC has an unsupported disk layout for UEFI Firmware.

 

[HelloNNNewman]

Hi ReprobusR,

I generally like to answer questions here for users, but since this is a common question within the MS Community - it's easier not to reinvent the wheel. You may want to check out those discussions first.. such as this one. Good Luck!