To enable Secure Boot on Windows 10, use these steps: Open Settings. Click on Update & Security. Click on Recovery. Click the ...

The recommended method to convert these disks is to upgrade the operating system to Windows 10 first, then perform the MBR to GPT conversion. So 2k8 sounds like a no no even for an offline conversion.

Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks.

With Microsoft ending Windows 10 updates on October 14, 2025, millions of users must upgrade to Windows 11. This operating ...

To fix Diskpart Virtual Disk Service error, The specified disk is not convertible error, convert BIOS mode from Legacy to UEFI & clean your disk.