Thursday, February 21, 2013 8:39 PM
Question for Jordon Wees,
You wrote: I can successfully install both operating
systems in UEFI mode, with Windows 7 on the first partition and Windows 8 on
the second partition. <o:p></o:p>
But I couldn´t!<o:p></o:p>
Could you please provide me how to install Windows 7
64 bit on a PC that already has Windows 8 64 bit preinstalled?<o:p></o:p>
I have also a GPT-formatted hard disk with UEFI BIOS
but I get the error message that windows can´t install Windows 7 on the disk
because it is a GPT-formatted hard disk.<o:p></o:p>
I don´t understand this because it is a GPT-formatted
hard disk with Windows 8 on it!<o:p></o:p>
I can´t change the hard disk to MBR format because I
will lose Widows 8 and all other partitions.<o:p></o:p>
In the BIOS for the storage dives Boot´ option IThanks, Sia
selected the: only UEFI, I could also select the option ´first UEFI´ but it doesn´t
change the failure of installing Windows 7.<o:p></o:p>
Monday, February 25, 2013 10:08 AMModerator
Monday, February 25, 2013 11:32 PM
If I am reading your issue correctly. Windows 8 came pre-installed on a computer with a hard disk setup as a GPT with UEFI configured.
If this is the case then the outcome you are experiencing is correct.
Windows 7 does not inherently have the ability to install into a GPT disk from the base installation. The Windows 7 DVD is designed to install using BIOS mode.
Also note that Windows 7 x86 does not support UEFI mode.
These two articles below may help you.
MCTS: Windows 7
MCITP: Windows 7 Enterprise Administration
MCSA: Windows 7