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I'm trying this windows 7 usb/dvd download tool that I discovered from ars technica: http://arstechnica.com/business/news/2009/12/-the-usb-flash-drive.ars

But I don't know why my windows 7 iso file does not work and its saying that its not a valid iso file. What do I do, do you know of other tools that can burn / extract iso file contents to a flash drive? Except the tool that is always showing up when you search in google, the command prompt one: http://arstechnica.com/business/news/2009/12/-the-usb-flash-drive.ars/2 A free tool for windows xp or 7

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up vote 2 down vote accepted

You could try the Microsoft's Windows 7 USB/DVD Download Tool which is their tool for putting their ISOs onto a bootable USB stick.

I used it to install Windows 7, worked like a treat.

You can also get a decompresser like 7-Zip that will open ISO's, and should help you figure out if the ISO is corrupted.

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the tools which you are saying is exactly the same tool that I mentioned that didn't work. –  Ieyasu Sawada Apr 26 '10 at 1:46
    
Hey you're right. I looked at the link, but since I only saw command-line action I figured it was a different tool. If it doesn't work, and an ISO-aware decompresser like 7-Zip can't open it, then I'd say the ISO is corrupted. –  techie007 Apr 26 '10 at 12:42
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hmm the official location for the usb tool is http://store.microsoft.com/Help/ISO-Tool so I'm not sure what you downloaded.

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