You will still need to modify the inf file. It sounds like it's plug n play with uefi. I've just googled and this is due to windows 7 graphic driver that need CSM support. You've mentioned by yourself that windows 7 can not be installed without legacy compatibility. I mean pure UEFI as 'UEFI without legacy or without CSM'. One last question, you've done it in alienware right?Īsking because, not only me but Mr Fox and everyone I know failed to install windows 7 in pure UEFI. Windows Server® 2008 R2 and Windows Server® 2008 also support EFI 1.10 on Itanium-based systems. Support on Class 2 systems running in legacy BIOS-compatibility mode by using a CSM, so they can use the legacy BIOS INT10 features.Īre not supported on Class 3 systems, because these operating systems assume the presence of legacy BIOS INT10 support in the firmware, which is not available in a Class-3 UEFI implementation. They also support BIOS-based PCs, and UEFI-based PCs running in legacy BIOS-compatibility mode. Support UEFI 2.0 or later on 64-bit systems. Windows® 7, Windows Vista® with Service Pack 1 (SP1), Windows Server® 2008 R2 and Windows Server® 2008 Some features such as Secure Boot require UEFI 2.3.1. Windows Server 2012 R2 and Windows Server® 2012 support native UEFI 2.0 or later on 64-bit systems. Some features such as Secure Boot require UEFI 2.3.1 Errata C or higher. Windows 8.1 and Windows® 8 support native UEFI 2.0 or later on 32-bit (x86), 64-bit (圆4), and ARM-based PCs. The following Windows editions include support for UEFI:

UEFI itself is suppoted by windows 7! Even vista supports uefi! You just need to be using a 64-bit version of windows.

This is true uefi mode with legacy boot disabled! I have done this countless times. What we need is ' load legacy option rom : disabled '.Īnd with this disabled, I dont think it is currently possible to install win7 in alienware. I think you installed win7 in 'UEFI with LEGACY option'.

Alienware windows 7 ultimate x64 oem