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.

Transferred from Other Hardware I finally have sufficient HDDs to transfer over backups. Can I change from mbr to gpt on two of the drives to avoid transferring 5GB of data just to change the disc ...

EaseUS simplifies this critical MBR to GPT conversion by offering a fast, reliable, and user-friendly MBR-to-GPT conversion tool—helping users overcome common upgrade obstacles while minimizing ...

EaseUS simplifies this critical MBR to GPT conversion by offering a fast, reliable, and user-friendly MBR-to-GPT conversion tool—helping users overcome common upgrade obstacles while minimizing ...

Without GPT, Secure Boot cannot be enabled, blocking Windows 11 upgrades and some new games or software. EaseUS' Solution To address these challenges, EaseUS Partition Master offers a reliable and ...