08-16-2012 10:09 PM
Apologies if this has been answered prior (I've searched through the forums for viable solutions).
I decided to format my hard drive on my Lenovo Thinkpad X220 laptop and perform a clean install of Windows.
Since my laptop lacks a CD drive, I proceeded to download a Windows 7 Professional .iso file in hopes of using it as a
bootable USB tool.
Extracted the .iso file to the USB, went in BIOS and selected the USB, but to no avail.
Decided to download the Windows 7 USB/DVD tool exe with the .iso file I still had, but ended up receiving this prompt:
After a bit of googling, apparently there's a bypass to this by switching the .iso file to UDT (however the .iso file I had was already listed as UDT).
If anyone has had any experiences with this, I would love to hear your feedback or advice.
Solved! Go to Solution.
08-16-2012 10:21 PM
did the site you got the iso from list an md5 checksum? if so, you may with to check your download file to rule out a corrupt file. i've never used the microsoft tool you're trying, but the bit i read about seems to indicate that all you need is the iso, a suitable usb stick and the app. since it's complaining about the iso, i'd check its validity.
sorry if you've already done all of this...
08-17-2012 02:40 AM
I downloaded the Windows 7 Profesional SP1 x64 .ISO from Microsoft and used the Windows 7 USB/DVD Tool to create a bootable USB flash drive for a clean install of Windows 7, just as you did, several weeks ago. I had no problems making the flash drive or installing Windows 7, so I suspect it was a bad download.
08-17-2012 02:55 AM
great confirmation, Aryeh, that all the pieces should fit together!
08-17-2012 07:35 AM
I suspected the same, but I guess we'll see after I download another .iso.
I'm grateful for the feedback, thanks to you both! I'll try to update soon.
08-17-2012 08:00 AM
08-17-2012 08:40 AM
Update 1: So I downloaded another .iso file, but it must have been corrupt as well since I ended up with the same prompt.
Do you guys mind if you re-direct me to another valid .iso file for Windows 7 Professional x64?
Thanks, will update.
08-17-2012 08:58 AM
i will defer to Aryeh since his experience was successful. i'm sure he'll be along.
please bear with us.
08-20-2012 07:52 AM
Just wanted to ask if you were downloading them from the Microsoft site or a third party? For example this link:
08-20-2012 10:44 AM
I believe I downloaded both .iso files from this website here which has the same links.
Looks like the .iso files were corrupted (I've heard some people had to re-download sometimes).
I looked for alternatives and ended up finding one that worked.
Thanks for the help.