Dell Bios Update using a WinPe Boot USB | "test" message

In this Video due to the "test" message that Shows up in some Dell computer models when trying to update the Bios version from a USB flash Drive. I create a bootable USB drive that contains a light version of Windows 7. This in order to avoid the "test" message.

UPDATE: This method is advisable if you get the "test" or "this can't be run on DOS mode "messages when trying to update your BIOS version using a bootable USB. However, depending on the computer model you have it may or may not work.

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► (AIK) for Windows® 7 (1.7 GB):
https://www.microsoft.com/en-us/downl...

► Create a Bootable Windows PE:
https://docs.microsoft.com/en-us/prev...

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https://www.dell.com/community/Window...

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►Cheat sheet :

You need to have administrator rights on the computer

Have the USB already insterted to make it bootable

Open “Deployment Tools Command Prompt” and type: copype.cmd x86 c:\winpe_x86

Copy the base image "winpe.wim" into \Winpe_x86\ISO\sources folder and rename the file to boot.wim.

copy c:\winpe_x86\winpe.wim c:\winpe_x86\ISO\sources\boot.wim

Mount the boot.wim to c:\winpe_x86\mount directory for editing and type the following commands:

Dism /Mount-Wim /WimFile:C:\winpe_x86\ISO\sources\boot.wim /index:1 /MountDir:C:\winpe_x86\mount


To unmount the file system and compile back to boot.wim

Dism /unmount-Wim /MountDir:C:\winpe_x86\mount /Commit


Now, format or copy all to the USB flash drive:


xcopy C:\winpe_x86\iso\*.* /e G:\


When you are done issue the command: Dism /cleanup-wim

Finally, delete the folder created in the C drive.

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