Download MediaCreationTool1909.exe (or whatever version of this tool is current) from Microsoft's site.
For comparison, the ISO image named Win10_1909_English_圆4.iso, available for direct download from Microsoft's site, weighs in at 5,421,461,504 bytes, and will not fit on a DVD5. I've yet to install Windows using it, but the resulting ISO file is well within the capacity limit of a DVD5 ( 4,707,319,808 bytes), weighing in at 4,271,374,336 bytes. I just solved the problem of downloading an ISO image file of Windows 10 Professional 1909 圆4 that will fit on a DVD5. Nevertheless, I believe my answer may be of value to a wider audience, beyond the original questioner, who may be asking themselves the same question of Windows 10. Using the Windows 8.1 Media Creation Tool with the command line options provided in this answer will not work no command-line options exist in the 8.1 version of the MCT. Please note that my answer relates to Windows 10 not Windows 8.1. But they all have USB ports and can boot from a USB device.) (Also bear in mind that DVD drives are not really standard anymore in new computers. Have you considered to make a bootable USB stick instead ? It is a lot faster to install Windows from USB.Ī 8 GB USB stick costs about the same money as a couple of dual-layer DVDs and the USB can be re-used for something else after use. This will give you an effective capacity of 8.5 GB. Obviously you can burn to a dual-layer DVD. Rolling your own ISO starting from a base Windows ISO and adding only the desired patches (and possibly some drivers) is MUCH easier and you can control the size of the resulting ISO with a lot less hassle. Modifying a pre-build ISO to take out some updates is possible but it is an arcane art.Įxtremely complicated and you will need to have a very good understanding of how slipstreaming works.
The DVD format doesn't support compression on the DVD in this way. You can compress the ISO file however you want when it sits on your harddisk, but the data is always written UNCOMPRESSED to the DVD. As you already noticed: Compression is not going to work.
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