HELP! Borked Windows Install, can't use M.2 drive

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21 Oct 2012
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Hi guys. I've just built a new PC and can't get Windows to install on any of my drives.

I get the message "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."

I haven't got a clue what I'm supposed to do about this now.

How can I get my devices to be GPT disks?

For info, I have taken an old SSD from a previous computer that had Windows installed onto it. I don't want to use that drive anymore, I want Windows on the M.2 drive.

Can I boot into Windows from that drive and then repair my M.2 drive and from there?
 
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