Thanx for the Windows 7 ISO downloads.
From time to time I come across USB memory keys that will not work with Windows 7 USB DVD Download Tool for whatever reason.
Here is a way that ALWAYS works. Its best, though, to have a memory key that does not have a separate software partition on it Such as a Sandisk Cruzer U3. You also want to use a 4GB memory key at a minimum.
These steps will totally erase your memory key. Remove any data you want to save.
You also need the Windows 7 ISO and software to mount the ISO (such as MagicISO)
1) MOUNT the ISO file and notate which Drive letter your virtual drive is listed.
2) Place your memory key in the USB port and in Windows (doesn't matter which version) Do Start/Run and type CMD then press [ENTER].
3) At the command prompt, type in DISKPART and hit enter.
Wait for Diskpart >
4) Next type LIST DISK command and note down the Disk number (ex: Disk 1) of your USB flash drive. Look at the MB size to be sure you are picking the right drive.
5) Next type all the below commands one by one. Here I assume that your disk drive no is “Disk 1”.If you have Disk 2 as your USB flash drive then use Disk 2. Refer the above step to confirm it.
So below are the commands you need to type and execute
one by one:
SELECT DISK 1
CLEAN
CREATE PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=NTFS
(Format process may take few minutes)
ASSIGN
EXIT
6) From step number 1, you will need the drive letter for the virtual drive of the ISO.
At the command prompt, type in the following.
Replace "c:\" with the virtual drive letter of the ISO file.
Replace "d:\" with the drive letter of the memory key.
xcopy32 c:\ d:\ /h/i/c/k/e/r/y
and press [ENTER]
This will take several minutes. Once done you are ready to boot into the USB Key!