That is what helped lead to the "random" outcome observations, in addition to whether the machine I was installing on happened to support UEFI.
But sometimes I burn at 8x just because I didn't realize until last minute that I didn't have an installation DVD handy. I've always been in the habit of burning at 2x, just because I'm usually not in a hurry, and 2x burn was always historically more reliable that pushing the burn limit of the media and/or hardware. What I finally realized is that it was only "some disks", and only "on UEFI-capable machines." ISO from the same machine using the same hardware and same version of CDBurnerXP - but select 8x or 16x speed instead of 2x - the resulting DVD is bootable for both UEFI and for Legacy BIOS, exactly as it should be.Įver since Windwas released, I downloaded and burned my installation DVDs normally and successfully just as I did for every previous release, and thought "everything was fine." But then "randomly" the discs I carried around with me wouldn't work. The disc just looks "non-bootable" to the UEFI machine. It won't boot in a UEFI-capable machine even if booting Legacy mode. ISO at 2x, the resulting DVD is "bootable", but only for Legacy / non-UEFI machines. But I've re-tested and re-burned multiple times, and the results stay consistent for me. The "improbable" part is that I feel like I've found the "cause" of the issue: Attempting to burn at 2x speed, instead of 8x or 16x.
#Burning bootable iso windows 10 windows 8.1
Even though the previous Wind(November 2015) and Wind(July 2015) releases that I downloaded from Microsoft didn't show any such issue, and even though I'm still burning discs from the same Windows 8.1 圆4 machine and burner hardware, etc. I know what I'm about to describe will seem improbable, but I've been having issues being able to boot the Wind(July 2016).
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