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)?

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

HI:

This is just a heads-up about an issue you may not know off......

After prepping a Windows 7 external USB HD everythings works GREAT.....

..... UNTIL the drive is accidentally plugged into a PC booted from Windows 8.1.

Apparently 8.1 modifies something on the HD because the next time I boot from the W7 USB Ext drive, the boot fails (after showing the W7 startup logo) by dropping back to the BIOS display screen.

It boots again and this time gives me the option to run a bootup repair or continue starting windows normally. I continue starting windows normally and everything if fine.

Everything keeps working fine unless I once again plug the ext drive into a W8.1 booted computer. Then it does the same routine again.

Windows 8 certainly does something to the ext drive to mess it up for W7 booting.

Boowho??

I have a spare SSD (64gig) that I am trying to use WinToUSB on. I have tried creating a 110mb partition formated either NTFS or Fat32 and the rest of the drive as the boot partition formated at ntfs. I am using a Windows 8.1 Enterprise ISO as the source. Each time I run the WinToUSB utility it writes to the selected partitions but when I try to boot off that ssd drive I get an error telling me that there is no boot partition and it fails.

You docs do not mention creating the necessary partitions and I using the ssd that was formatted as one partition. I thought maybe your utility would partition the drive for me but apparently not.

Should I try a different win8.1 version? Pro instead of Enterprise? x86 instead of x64?