Windows 8.1 Uefi installation

[Spynx]

I am trying to install windows 8.1 on a GPT disk using a usb drive. It stops at about 91% with the error: "Windows cannot install required files. Make sure all the files are available. Error code: 0x8007025D. I also used all defaults in the Bios.

I used the same method on my laptop and it worked.

PC specs: Gigabyte Z77X-UD5H (Bios F16), Gigabyte 760 GTX, 16 GB Ram, OCZ Vertex 4 256GB, Core i5 2500k.

If I install it regular (MBR way) the OS installs.

Can somebody help me, it's driving me crazy

 

[itareanlnotani]

Not quite a solution to your problem, but maybe try install as MBR, then change to GPT

https://social.technet.microsoft.co...erting-windows-bios-installation-to-uefi.aspx

 

[adam_g]

I am trying to install windows 8.1 on a GPT disk using a usb drive. It stops at about 91% with the error: "Windows cannot install required files. Make sure all the files are available. Error code: 0x8007025D. I also used all defaults in the Bios.

I used the same method on my laptop and it worked.

PC specs: Gigabyte Z77X-UD5H (Bios F16), Gigabyte 760 GTX, 16 GB Ram, OCZ Vertex 4 256GB, Core i5 2500k.

If I install it regular (MBR way) the OS installs.

Can somebody help me, it's driving me crazy

After I read this I was meaning to switch my pc to uefi so I decided to I too got the same error but it's easy to work around what you need to have is one single unallocated space to install win 8.1 go to that link to format your drive to gpt first
http://technet.microsoft.com/en-us/library/dn336946.aspx
You then need to make your flash a uefi bootable drive go to that link http://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html

Once I used the program Rufus it worked and let me install in gpt (uefi mode)

Now I need to download all my drivers again

This should help you

 

[jansdejager]

if you have a mbr-formatted disk I suspect it will cause problems. you need the first partition to be a 200mb FAT32 partition, otherwise there is nowhere to install the startup files. if you're disk is mbr already, there is no space to create this partition and the win8.1 installer won't be able to create it. best plan is to delete all the partitions during install and hope the installer creates the necessary partitions (not a given, but I'm on Win7 and I created the partition before installing). Once you are in Windows you can mount your 200mb "EFI" partition with the command "mountvol z: /s" from an administrator command prompt, if it exists.