Windows 7 USB/DVD Download Tool Invalid ISO file

Hey,

I downloaded a Windows 7 (x64) ISO file with my MSDNAA license.
I want to create a bootable Windows 7 on my USB flash drive to install it on my new laptop.
However, after I selected the ISO file and click on the "Next" button I got an error message: "Invalid ISO file - The selected ISO file is not a valid ISO file. Please select a valid ISO file and try again."

If I extract the ISO file with 7-Zip, it creates a readme.txt containing following text:
"This disc contains a "UDF" file system and requires an operating system that supports the ISO-13346 "UDF" file system specification."
It also creates a folder called [BOOT] with a "Bootable_NoEmulation.img" file.

Can anybody help me or at least explain me why I'm not able to create a "Windows 7"-USB flash drive?

If this information is useful: Windows 7 x86 is running on my computer.

Thanks a lot,

Daniel

Thanks a lot!
Now it works, but I've got already a new problem:
In the installation process I got following error message: "Load Driver - No device drivers were found. Make sure that the installation media contains the correct drivers, and then click OK".

What do I have to do now?

Is your HD showing here:

Nope, it's showing a window with the title "Select the driver to be installed", and not like in your image "Where do you want to install Windows?".
I have buttons for "Browse", "Rescan" and "Next" as well as a checkbox "Hide drivers that are not compatible with hardware on this computer."
Sorry, that I didn't upload a screenshot, but I hope my description will do it as well.

Put your SATA Controller drivers on the USB.Than load drivers.

NOTE: for this example, I am using Promise Fastrak 376.

Sorry, this might be a stupid question, but how can I find out which driver I need?

What SATA Controller do you have?

Filling out System Specs

Can you post your specs.

Just filled it out. Is this enough information or do you need more?

Just found something: Might it be the "Intel(R) 5 Series 4 Port SATA AHCI Controller"?