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I have a large USB drive that I would like to use to multi-boot several Windows products. The way my project seems to differ from every other thing I have found on Google is that I want it to work seamlessly with Secure boot enabled, and I'm not trying to boot Linux.

I have four items that I want to boot: Windows 8 x86 and x64 installation discs, and WinPE 4.0 x86 and x64. Later, I might wish to add Windows 7 and WinPE 3.0, but that isn't necessary at this point.

The problem that I have is that I am unable to choose the item that I wish to boot, because there is no boot selection dialog that I can find anywhere. I am able to create the USB with multiple .wim files in the sources folder, and I have even been able to use BCDEdit to modify BCD for multiple OS entries - but none of them ever show up!

How can I fix this problem? From a single USB drive, I wish to be able to install Windows 8 or boot from a PE.

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The process works best if you already have Windows 7 installed and add the Windows 8 installation. This replaces the Windows 7 Boot Manager with the Windows 8 Boot Manager. This will allow you to simply add additional options to the bootable partitions. In the end you might have to use an alternative Boot Manager like Grub 2. Windows 7 does not support Secure Boot. **If the boot options are not showing up you are not doing a required step to display those options for Windows 8 ( the process is slightly different then Windows 7 ). –  Ramhound Apr 24 '13 at 16:21
This isn't for an installed OS, it's for USB boot installation and PE disks. –  Bobby Tables Apr 24 '13 at 16:55
Considering my own advice has worked for me in the past it should work. –  Ramhound Apr 24 '13 at 20:15
Well, I found howtogeek.com/126093/… which was helpful for combining my Win8 installers, but I still need to figure out how to throw WinPE4 into the mix. For all the hacking I've done to my BCD and boot.wim, I can't believe I have never seen a boot options menu ever. –  Bobby Tables Apr 24 '13 at 20:38
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