📎 AI Summary:
The forum discussion addresses issues with dual-booting Windows 7 x64 and Windows 8 on a UEFI system, where the original poster encounters an error related to GPT partition style during installation. Several users suggest troubleshooting UEFI/Legacy mode settings, Secure Boot disabling, and ensuring the proper partitioning before installation. The overall sentiment indicates that configuring UEFI settings and understanding the compatibility between Windows versions and UEFI is key to resolving the installation problems.
Aced

Aced

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Apr 29, 2013
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Thread Author #1
I've come across this error message when installing "Windows 7 x64 Ulti" "Windows cannot be installed to this disk, The selected disk is of the GPT partition style".

I have Windows 8 Installed, it came with the laptop. I have tryed all options on my side e.g. legacy mode, boot order.

I am trying to dual boot windows 8 and 7. Can someone help me out?
 

Solution
Sonny
I am dual booting with win 7 and win 8. I done it in the UEFI mode. The problem I had was that I did not have Windows 8 Feature disabled. That was located in Windows 8 Configuration. I have an MSI MB. Don't know how other boards are set up.
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J

Joe S

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#2
Look down in the Windows 8 area you might find more info there.
Joe
 

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Jimbo22

Jimbo22

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Aug 27, 2008
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#3
Have you made a partition to install windows 7 on? Usually when dual booting windows 7/8, ideally you want to have windows 7 installed first then install windows 8 because of the dual boot option of windows 8 is more efficient then the one of windows 7. Since yours came preinstalled with windows 8, this is a new one for me. Let me do some checking and I get back to you on this.
 

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J

Joe S

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#6
I wonder if the problem has to do with secure Boot and UEFI. That's all pretty new and not well understood yet.
Joe
 

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Sonny

Sonny

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Nov 17, 2009
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1,386
#7
I am dual booting with win 7 and win 8. I done it in the UEFI mode. The problem I had was that I did not have Windows 8 Feature disabled. That was located in Windows 8 Configuration. I have an MSI MB. Don't know how other boards are set up.
 

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Solution
Saltgrass

Saltgrass

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Microsoft Community Contributor
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Oct 16, 2009
Messages
15,152
#8
Do you know how to boot the Windows 7 DVD in UEFI mode? You normally need to use the Boot Device menu and look for a designation of UEFI in conjunction with the install media.
 

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