I thought about it some more and it don't make sense, more is involved, cause windows 7 boots, then disables usb and loses connection, investigating into the cmd files I found some more commands are used, this one looked interesting:

rem http://msdn.microsoft.com/en-us/libr...ded.1001).aspx
rem Deploying Microsoft Hyper-V Server 2008 R2 on USB Flash Drive
rem http://technet.microsoft.com/en-us/l...8WS.10%29.aspx
reg.exe add %Control%\PnP /f /v PollBootPartitionTimeout /t REG_DWORD /d 30000
rem Loads VHD, SD, and USB boot drivers.
reg.exe add %Control% /f /v BootDriverFlags /t REG_DWORD /d 0x6

Googling the bottom command leads to this page:

https://superuser.com/questions/1411...on-a-usb-stick

The guy writes the following, in short:

Windows 7 did have build-in windows to go but was never activated, these commands seem to active it, his original post:

Also contains links to tools that also might help.

"


This question is similar to Can I install Windows OS (Windows 7) on a removable USB hard drive?

With Windows 7 SP1, there is an easier way to install Windows 7 to a USB Hard Disk or USB Flash Drive.

This was discovered by cdob at Reboot http://reboot.pro/topic/14186-usb-hd...-sp1/?p=127587

It boils down to two registry keys, which i think are present in Windows 8 to enable Windows To Go feature. I guess this feature was present in Windows 7, but was never activated.

reg.exe add HKLM\System\CurrentControlSet\Control /f /v BootDriverFlags /t REG_DWORD /d 0x6 reg.exe add HKLM\System\CurrentControlSet\Control\PnP /f /v PollBootPartitionTimeout /t REG_DWORD /d 15000

You can install Windows 7 to a USB Hard Disk or Flash Drive using a Tool called WinNTSetup which I have mentioned here Is there an equivalent to Windows To Go for personal use? This tool uses the above registry settings to enable Windows To Go in Windows 7

This tool is easy to use and you quickly install Windows 7 your USB Hard Disk. This tool also allows to create VHD (Virtual Hard Disk) on your USB Drive and install Windows 7 to the VHD on the USB Drive.

This installation will be persistent.

More information in the below links.

http://agnipulse.com/2012/11/windows...s-windows-7-8/

http://www.msfn.org/board/topic/149612-winntsetup-v306/
"

Bye,
Skybuck.