trying to load a win 8.1 64 bit iso, esd version onto a usb hdd...error 0x0000008000850000 comes up at 100% completed. win 7 64bit works fine...any ideas??

I have been successful in installing Windows 7 Ultimate 64bit on128gb usb3.0 flash drive. The problem happens once I attempt to run it.. The splash screen comes up and the drivers begin to install, once I get to 100% I get an error. Due to hardware on this computer setup cannot be completed. It basically reboots and starts the process over again with the same result.. I know that Windows 7 has issues with USB 3.0 so I have tried installing and running in a USB2.0 slot using the USB 3.0 flash drive with no luck. I even tried using my Windows 8.1 OS but I get a spinning wheel on boot that doesn't go away it seems. Any help is appreciated.

I'm trying to put the Windows 8.1 Enterprise evaluation version on a 128GB usb-3 stick. This boots fine on 2 of 3 computers. But the third computer just hangs without ever loading Windows - it freezes on a black screen with a cursor in the upper left. I suspect this may be because the stick isn't formatted gpt with a efi system partition (the two computers that work are bios), but if I do so before trying to install, wintousb insists I must format the stick before proceeding. It then creates an msdos partition table with just one ntfs partition.

So, how can I get wintousb to respect the partitions on the stick before install? If that's not the problem, how do I get it to load on the 3rd computer (which has no trouble in general booting from usb)?

Is it possible to make a WinPE ISO using EasyUEFI so that I can boot it on a UEFI system?
The current version refuses to run on a non-UEFI system but all I want to do is make a WinPE ISO containing EasyUEFI. Does Windows 7/8 already contain the correct EFI boot files or could you get them from a Win 7/8 install DVD which could be provided by the user?

Tried to put Win7 x86 and it's getting stuck on disk.sys and blue screens. Should I replace driver with something else?

Hi!
With no problem I created a live Windows 7 on a Kingston Ultimate 3.0 G3 USB drive. The system runs perfect on my older laptop with Windows 7.

However I cannot boot from a newer Win8.1 system. The USB drive is not listed as bootable. I already disabled "secure boot".

Do I need to create an additional EFI partition (FAT32)?
(BTW: DiskPart shows the USB drive not labeled GPT.)


Thanks!

Cheers,
Galco

Is it possible to reverse this process and is it easy? Would I just plug in the hard drive while windows is running from my desktop and format the drive with the windows tool? Thanks

Hi there,

I think that the idea to run full Windows 8 from USB is great.

I downloaded your software and tried to put Windows 8.1 on a 16gb flash drive (Kept failing through the process around 12% with a file copy error)

I decided to buy an External hard drive enclosure and put my old 640Gb laptop drive in it.

It went through the process and said that everything is ready. I reboot my computer from the USB drive and about 10 seconds after I saw the Windows 8 booting screen I got blue screen.

I'm attaching a screenshot of error message. Any idea I'm getting this problem?

Thanks in advance,

Isaac

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When I try to use a win8 iso I get this

trying to install win 8.1 pro on usb samsung drive, windows installer sees the drive as usb and will not let me install to it,,anyone with ideas