Monday, November 23, 2015

uefi - Windows 7 refuses to install on gpt styled partitions in CMS boot mode




recently I had asked a question regarding windows 7 setip booting issues on a Toshiba windows 8 laptop. I was however able to boot into it with the boot mode set to CMS. The issue I faces was that, in CMS boot mode windows 7 refuses to be Installed on a gpt styled NTFS format partition even though windows 7 supports gpt. I ended up wiping my installatioj of eight and its recovery partitions before being presented with the error so I lost all chances of backing up any files. The lack of internet connectivity and a second PC made it even harder. So I wiped the drive and did a clean install. However, a little bit of research told me the error was because I did not boot in UEFI mode. The problem is, Toshiba refuses to recognize any removable media in the UEFI mode. I have a clean and working installation of 7 that boots up fine in CMS mode. But I'd still like to know why this happened, for the sake of knowledge. If anyone could shed some light it would be much appreciated.


Answer



Simple answer:



Because most OEM UEFI Firmwares are buggy, and some features just don't work as advertised on the box.


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