Windows 7 would not dual boot on vaio with windows 8 preinstalled UEFI

[Nfsvsgta]

Hello
Spent about literally hundred days. Trying to dual boot windows 7 on my UEFI vaio pre installed with windows 8. I tried to follow almost all the forums on the Internet. Created bootable usb which gets stuck at starting windows and used a dvd which the vaio does not recognise. When choosing legacy boot on bios then the problem comes that my hdd is not mbr and I am not in a position to format and delete everything due to important files. Pleas help me how do I install windows 7 on this Vaio as there is no guide for this specific platform. Thanks

 

[whs]

As far as the BIOS goes the VAIOs are very restrictive. I was fighting with a VAIO for several weeks until I RMAd it. You may want to try running the Win7 in a virtual partition.

http://www.sevenforums.com/virtualization/355103-virtual-os-tutorial-install-setup-operate.html

 

[Nfsvsgta]

Yes I even tried to install it on o virtual mbr disk but the setup would not install on it. I tried searching for manually installing it via powershell but m not good in coding and my PC does not have hyper v

 

[Nfsvsgta]

Further I have done it on VMware but it is too slow to use for my everyday tasks. It can't even run directx games

 

[whs]

Right, virtual is not for gaming. But that does not bother me because I am a strict anti-gamer.

 

[Nfsvsgta]

Lol. Well I think If I can embed the windows 7 to a vhd somehow and then set that vhd to boot via easybcd, then I can run win 7 but how can I embed one on vhd?

 

[ThrashZone]

Hi,
I believe you'd have to install win-7 first then add win-8 after if it's even possible.

 

[Nfsvsgta]

Any other alternate. I.e any way to install on vhd and then redirect boot of laptop to it. Or will windows vista install on UEFI since it would do the same task for me too. ??

 

[ThrashZone]

Hi,
I'm sure you would run into the same conflict installing Vista if 8 is already installed
You can have uefi bios and install Vista or win-7 just so ahci compatibility is enabled.
Secure boot would need to be disabled but CSM needs to be activated

OS Type has to be anything other than UEFI only.

Fast or quick startup needs to be disabled.

But most of all win-8 has to be installed after Vista or 7 is installed.
And that is unless the manufacture of the machine has not locked out win-7/ Vista installs.

 

[heroleo]

Windows 7 does not support uefi secure boot, so you may need to disable the uefi secure boot before installing Windows 7.

 

[Nfsvsgta]

Ok. I had attempted to install it on legacy boot which I be is csm. It loaded past starting windows but when choosing the partition it said it is GPT and has to be mbr. Any way to convert GPT partition to mbr without formatting the whole hard drive? The reason I m reluctant to format is that I don't have an original dvd of win 8 with me so no risks. Or is there any other way I can run win 7 on my PC by creating win to go or installing it on a vhd drive and booting it or any other way in which I can run windows 7 on my PC with all my nvidia drivers and cpu drivers and most importantly directx. In other words anything but not virtual machine or removing win 8. The worst part is that I can't even install aero glass ( one of the main attraction of win 7 for me ) on win 8 as again when I try to run it the error comes that secure boot is enabled. Whereas it is not. Help pls

 

[ThrashZone]

Hi,
Depends on how many partitions are on it MBR has a maximum of 4
http://www.sevenforums.com/tutorials/26203-convert-gpt-disk-mbr-disk.html

 

[Nfsvsgta]

Ok. I think converting to mbr is not in my plate since I can't remove win 8 and format anything. Any other way to install win 7. Since win 7 Can be installed on UEFI am I doing something wrong or what?

 

[Nfsvsgta]

Ok. Now I had booted into CSM and created a legacy vhd. But when I tried to install on it an error came related to no drivers on the vhd etc. help?

 

[Empire Software]

most pcs made with windows 8 dont have the hardware capabilities to run older oses

 

[Nfsvsgta]

No I am asking how do i install it on a virtual hard drive? I am getting the error 0x80300024 while selecting vhd. Help!!

 

[Nfsvsgta]

Any help?