Windows 8 and 8.1 Forums


Create a ISO from Win8.1 DVD

  1. #1


    Posts : 25
    WIN8.1/Server 2012 R2/Win 7 Ultimate

    Create a ISO from Win8.1 DVD


    Need help trying to create an ISO of the windows 8.1 dvd. I want to make a bootable USB stick when I go to install it to speed things up and make a backup copy. I can create the ISO using Alcohol 120 but when I use the Windows 7 USB/DVD tool to open the ISO it says it is not a valid ISO file.

    Every other bit of software can read it okay so it is an ISO file as far as I can tell.

    Anyone got any thoughts??

      My System SpecsSystem Spec

  2. #2


    Hi

    Simply follow the below guide to create a USB install drive.

    USB Windows 7 Installation Key Drive - Create - Windows 7 Help Forums

    You don't need an ISO file if you follow the DISKPART method.
      My System SpecsSystem Spec

  3. #3


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    I can create the ISO using Alcohol 120 but when I use the Windows 7 USB/DVD tool to open the ISO it says it is not a valid ISO file.
    Yes, the Windows 7 USB/DVD tool will complain if you don't have the option UDF selected. I don't use alcohol so I don't know if it has this option but with UltraISO or PowerISO, you set it from the property. See Screen Shot.

    Click image for larger version

    BTW, with USB Stick, You don't really need to use the tool, just use 7-Zip or Winrar to extract the content of the ISO file to the root of the USB then it should work
      My System SpecsSystem Spec

  4. #4


    Posts : 1,875
    Windows 10 Pro Prieview x64


    I was certain I used the Windows7-usb-dvd tool to make my 8.1 bootable USB. Now you make me doubt myself. Guess I'll test it and report back.
      My System SpecsSystem Spec

  5. #5


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    I use the Windows 7 DVD download tool to make my bootable thumb drives all the time. It can be fussy about the ISO being used though. I have never had an issue with any on my TechNet ISO's though. I have seen it reject modified ISO's in the past, stuff obtained on bit torrent for example. One draw back to this utility is it formats the drive in NTFS. This can be an issue when installing in UEFI mode. Some motherboard BIOS require the drive to be formatted in FAT 32 for UEFI mode to work. I've had to resort to using the diskpart method for my Wife's Acer.
      My System SpecsSystem Spec

  6. #6


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Quote Originally Posted by alphanumeric View Post
    I use the Windows 7 DVD download tool to make my bootable thumb drives all the time. It can be fussy about the ISO being used though. I have never had an issue with any on my TechNet ISO's though. I have seen it reject modified ISO's in the past, stuff obtained on bit torrent for example. One draw back to this utility is it formats the drive in NTFS. This can be an issue when installing in UEFI mode. Some motherboard BIOS require the drive to be formatted in FAT 32 for UEFI mode to work. I've had to resort to using the diskpart method for my Wife's Acer.
    Of course if you use the ISO's downloaded from TechNet then you won't have any problem because they built them with the correct format (Ie. UDF). However, The OP in this thread wants to build an ISO from his DVD and if he does not use the UDF (Universal Disk Format) format then the tool will not work and will give the error message above.
      My System SpecsSystem Spec

  7. #7


    Posts : 1,875
    Windows 10 Pro Prieview x64


    Quote Originally Posted by topgundcp View Post
    Of course if you use the ISO's downloaded from TechNet then you won't have any problem.
    "Of course" might be a bit strong. I didn't know that
      My System SpecsSystem Spec

  8. #8


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by topgundcp View Post
    Quote Originally Posted by alphanumeric View Post
    I use the Windows 7 DVD download tool to make my bootable thumb drives all the time. It can be fussy about the ISO being used though. I have never had an issue with any on my TechNet ISO's though. I have seen it reject modified ISO's in the past, stuff obtained on bit torrent for example. One draw back to this utility is it formats the drive in NTFS. This can be an issue when installing in UEFI mode. Some motherboard BIOS require the drive to be formatted in FAT 32 for UEFI mode to work. I've had to resort to using the diskpart method for my Wife's Acer.
    Of course if you use the ISO's downloaded from TechNet then you won't have any problem because they built them with the correct format (Ie. UDF). However, The OP in this thread wants to build an ISO from his DVD and if he does not use the UDF (Universal Disk Format) format then the tool will not work and will give the error message above.
    I get it bud. I was just making a comment based on past experience and pointing out that UEFI can be fussy about how the bootable thumb drives are created.
      My System SpecsSystem Spec

  9. #9


    Personally, I wouldn't bother with Alcohol (unless it's single malt) or Windows 7 USB/DVD tool - my weapons of choice are UltraISO and Rufus....and yes UDF is the way to go :-}
      My System SpecsSystem Spec

  10. #10


    Posts : 25
    WIN8.1/Server 2012 R2/Win 7 Ultimate


    Thanks guys. Had more issues so went the Rufus route.

    Decided that I really needed a bigger USB stick and went for a Sandisk 16GB USB3 stick. Bad choice.

    Turns out Sandisk USB sticks show up as a fixed drive not a removable drive and thus the USB tool would not see it. Rufus though saw it and did the job.
      My System SpecsSystem Spec

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Create a ISO from Win8.1 DVD
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