UEFI-install from USB don't work

[Burgurne]

Greetings.
I have made a bootable USB-key after this guide
http://www.sevenforums.com/tutorials/2432-usb-windows-7-installation-key-drive-create.html

When in post, I can select to boot from the USB-key "normal" or as a UEFI-boot
If I choose "normal" it boot right away, but if I choose UEFI, then it just boots the UEFI-shell from my mobo.

Using the Windows 7-dvd to boot from I galso get to boot "normal" or "UEFI", and booting this way, UEFI works fine, and Windows 7 installs with UEFI.

Is it normal, that boot from USB can't start an UEFI windows install? Or do I have to do something different to make it to work?

 

[gregrocker]

The extra steps required are outlined in UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums

The easiest method to format your flash stick is from Steps 1/2 of Clean Reinstall - Factory OEM Windows 7

 

[theog]

Is it normal, that boot from USB can't start an UEFI windows install? Or do I have to do something different to make it to work?

Use are your Boot menu key, to boot the USB Pendrive.

 

[theog]

Greetings.
I have made a bootable USB-key after this guide
http://www.sevenforums.com/tutorials/2432-usb-windows-7-installation-key-drive-create.html

When in post, I can select to boot from the USB-key "normal" or as a UEFI-boot
If I choose "normal" it boot right away, but if I choose UEFI, then it just boots the UEFI-shell from my mobo.

Using the Windows 7-dvd to boot from I galso get to boot "normal" or "UEFI", and booting this way, UEFI works fine, and Windows 7 installs with UEFI.

Is it normal, that boot from USB can't start an UEFI windows install? Or do I have to do something different to make it to work?

Are you formating the USB Pendrive in fat32?

 

[Burgurne]

I am using the exact same settings as for my bootable Windows 7 USB-key for installing on a MBR. It is only when I want to boot to mahe an UEFI-install it is a problem.

 

[theog]

Are you booting the uEFI drive. This screenshot is showing the uEFI DVD boot drive.

 

[bobkn]

With my Asus motherboard, a bootable USB drive appears in the one-time boot device selector as two options: one as UEFI, the other as not. (Both boot options contain the type of the USB flash drive.)

The drive must be formatted as FAT32, though. If the USB drive as formatted NTFS, it won't boot under UEFI. It can still be used to do the traditional MBR installation, though. That means that the Microsoft tool:

Microsoft Store Online

cannot be used to prepare a USB key drive if you want to do a UEFI install.

I've seen instructions for doing that in a number of places. Here's the short version:

Launch a command window with admin privileges. (Search on cmd. Right click on cmd.exe, and select "run as administrator".)

1. DiskPart
2. List Disk
3. Select Disk # (the drive number for the flash drive, from step 2)
4. Clean
5. Create Partition Primary
6. Active
7. Format fs=FAT32 quick
8. Assign

The copy the contents of a WIndows 7 installation DVD onto the flash drive. (Or extract the .iso with 7Zip. Or mount the .iso with a utility, and copy all of its contents.)

 

[Burgurne]

I Can't copy win7 installation on USB-drive when it is fat32. The Install.wim file is way to big for this.
But yes, my USB was formatted with NTFS, so it might be this that stops me.

I am aware of the bootmenu from BIOS where there are 2 versions of booting my USB-drive, one "normal" and one UEFI. But I don't know how to put windows install-files on a fat32-formatted USB-key. Is there a solution to this also?

 

[gregrocker]

Try Universal USB Installer with Win7 in dropdown.

 

[theog]

Option Two in
http://www.sevenforums.com/tutorials/2432-usb-windows-7-installation-key-drive-create.html

 

[bobkn]

I Can't copy win7 installation on USB-drive when it is fat32. The Install.wim file is way to big for this.
But yes, my USB was formatted with NTFS, so it might be this that stops me.

I am aware of the bootmenu from BIOS where there are 2 versions of booting my USB-drive, one "normal" and one UEFI. But I don't know how to put windows install-files on a fat32-formatted USB-key. Is there a solution to this also?

That's unexpected. Copying the contents of the .iso to the FAT32 key drive is exactly what I did.

Fat32 is supposed to support single files up to 4GB in size.

 

[BlessedSpear]

Tried Installing Windows 8.1 Heavier Edition and this worked. It would also work for any Windows 7 or 8- 8.1 Operating Systems.
>First create a new folder called wim on the C drive.
>Extract everything from the .Iso file to a folder anywhere on your computer such as Desktop.
>Copy the install.wim to the wim folder you made on c drive. c:\wim
>Use this command to split your install.wim
in an elevated Command Prompt.

Dism /Split-Image /ImageFile:c:\wim\install.wim /SWMFile:c:\wim\install.swm /FileSize:2500

>Then put the new install.wim files back into your folder that you extracted your iso from, and delete the original.
>Lastly,Format your USB and insert all of your files into it.
Boot : D

I have no idea if it is due to Fat32 not allowing files up to more than 4 gigs, but I do know this.You can boot from a USB if you just copy the All of the files from the CD or image to the USB and boot from it.
Good Luck.

Also it does say that you can not split Windows 8 or 8.1 install.wim files in it, but I guess Microsoft was lying lol