Mark as Active not available for my boot drive in Windows 10

I cloned my old HDD to an SSD, but now I can’t set the SSD as active because the option is greyed out in Disk Management. The BIOS detects it fine. Am I missing something?

Tagged: Windows 11

External hard drive

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Mira Lennox Lennox

Participant

August 12, 2025 at 6:16 am

After cloning your HDD to an SSD, you might find that the option to mark the SSD partition as active is greyed out because the partition is either already active or the SSD uses the GPT partition style, which doesn’t require an active partition. To check this, open Disk Management, right-click the SSD disk, go to Properties, then the Volumes tab, and look at the partition style. If it’s GPT, you just need to make sure your BIOS is set to UEFI mode and that the SSD is the first boot device. If it’s MBR and your system isn’t booting properly, you may need to repair the bootloader using Windows recovery tools.

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