Fix Windows USB/DVD Download Tool when unable to copy files

Julio Franco

TechSpot Editor
Staff member
Installing Windows from scratch can be more or less of a pain, especially when the Windows 7 USB/DVD tool (so you can create a bootable USB drive with the installer) fails to work.

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If you are getting an error "Unable to copy files…" to the USB drive, here's a quick fix:

First run “diskpart” from a command prompt with admin rights. Then...
  • list disk
  • select disk # (the number of your USB - make sure this is it!)
  • clean (this will clear the Master Boot Record)
  • create partition primary
  • select partition 1
  • active
  • format quick fs=fat32
  • assign
  • exit
Be EXTRA careful about the disk you are selecting. Choose the wrong thing and you could potentially delete a working partition with all your data in it.

This should get you going with the Windows 7 USB/DVD tool (WUDT). If for some reason it still won't work, you could try an alternative program which is recommended by many (I've personally only used it once) called Rufus.

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Like Microsoft's tool, Rufus is a small piece of software that let's you format and create bootable flash drives from ISO files. Rufus claims to be twice as fast as WUDT and other alternative utilities so it's definitely worth a shot for your next OS reinstall.
 

IjemOfili

TS Rookie
Thanks for sharing this. RUFUS does work, however it is nowhere as fast as the WUDT for preparing a Windows 8 install usb media.
 

Naiim

TS Rookie
Hi, I was facing the same issue and tried all of your solutions including Rufus. Still not working, the same error comes. I have tried in 3 usbs with no success. Kindly help
 

MaikuTech

TS Evangelist
Hi, I was facing the same issue and tried all of your solutions including Rufus. Still not working, the same error comes. I have tried in 3 usbs with no success. Kindly help

Which usb flash drive brands did you try ?
Some well known and not well known brands don't work for usb os booting.
https://www.amazon.com/dp/B007YX9O9O/?tag=httpwwwtechsp-20

https://www.amazon.com/dp/B005LFT37U/?tag=httpwwwtechsp-20

One of those 2 should be enough to enable the usb flash drive to boot during preposting.
Make sure it is formatted in fat32 and nothing else, do not bend the metal tip of the flash drive.
Over time it will stop it from working correctly and not boot any os you attempt to put on it.