How do I create a running Windows 7 from a USB drive?

Honored Experts.

I need to make a bootable usb flash drive with Windows 7.
I have done a pretty intense search in Google, but all results ends up with a bootable flash drive for INSTALLING windows.

What I need is tool for diagnostics running as an indenpendable windows installation from a bootable usb drive.

Can anyone tell me how to accomplish this?
I am familiar with the process in making the usb drive bootable with diskpart, but I dont know how to get it installed with windows
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This can be done in many ways, I've used this method:

Windows 8 has the "Windows to Go" option already to be dropped into a USB, maybe you want to consider this option?  It might be easier depending on your time and technical ability:

Note:  You need Windows 8 Enterprise to do this.
Joe Winograd, Fellow&MVEDeveloperCommented:
Here's a thread that discusses it:

I participated in it, but misunderstood the requirement — I answered with what you do not want...a bootable flash drive for installing Windows. Ultimately, the asker answered it himself, and I think his solution is what you're looking for. Regards, Joe

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Joe Winograd, Fellow&MVEDeveloperCommented:
Glad you like it. I learned a lot from the folks on that thread...happy to pay it forward. Regards, Joe
OhmitAuthor Commented:
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Joe Winograd, Fellow&MVEDeveloperCommented:
I used to travel a lot on business, sometimes to your neck of the woods, but not anymore. However, if any Danish travel is in my future, I'll take you up on the offer. Cheers, Joe
OhmitAuthor Commented:
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