Going from Windows 7 to 8

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caspeer_costel
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Joined: 12/30/2011
Posts: 66

Hello first of all,
My laptop was acting up and decided to reinstall the operating system on it and decided to give Windows 8 a try but I encountered some problems...
I made a bootable flash to install from and when I try to install, on the section of the install wizard when I should select my partition, I can't seem to do anything but format the partitions but not to install on them... I get the following pop-up:
"Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed on GPT disks. Windows cannot be installed to this hard disk space. The partition contains one or more dynamic volumes that are not supported for installation."

I did some reading and found out that I should somehow with some software convert my partition(s) in order to be able to install.
Could you please explain what this is about and how? Can I only convert one partition while leaving the other 2 as they are? I currently don't have any way to save my data so I can do a full wipe.
Thanks in advance

eire1274
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Joined: 09/12/2003
Posts: 1135

Windows 8 requires the new GUID Partition Table to get around limitations that the rather ancient Master Boot Record system is still limited with. GPT is not the partition, it is the partition table system that defines the virtual (or partition) drives.

EFI systems have disc access modes that Windows 7 literally had a patching method to get MBR to work with, and Windows 8 doesn't have that patch. It's MBR for older BIOS systems, and GPT for EFI machines, and no choice, but this directly reflects how EFI (or UEFI) is on most all boards produced these days.

Disc conversion is possible, but I do not in any way recommend it, especially with multiple partitions on a single drive, because if a problem occurs you may wipe out the entire drive. You really need to have a full backup before ever trying something on this magnitude.

Nick McDermott

caspeer_costel
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Joined: 12/30/2011
Posts: 66

Hey,
I managed to do what I wanted using GParted. I had to wipe everything and work from scratch.
Have a nice day!