MBR for Legacy BIOS, GPT for UEFI. Convert disk partition style to ... copy the data from all drives to an external hard disk drive. Many third-party apps for copying data without booting to ...

Installing Windows from scratch isn't necessarily a hard thing to do ... scheme. Some UEFI releases do support booting from an MBR disk, but you may need to set it up in the UEFI/BIOS settings.