ASUS T100TA – How to install Windows 7

32-bitasus-laptopuefiwindowswindows 7

I need to install Windows 7 on my ASUS T100TA which has a 32-bit EFI without Legacy Boot option. Windows 8.1 is very lagging, so why don't try install Windows 7?

First, I prepared 32-bit Windows 7 install USB, entered into BIOS, disabled Secure Boot, but the USb didn't boot.

I also tried other way: Created Windows PE 5.1 bootable USB with extracted Windows 7 ISO which successfully booted. I then opened Command Prompt and ran Windows 7 setup, accepted license, selected "Custom install", deleted ALL partitions from 32GB Flash drive, created new partition, but it can't install Windows 7 there (missing Intel SD Host Controller driver).

Can anybody help me unlock the Legacy Boot option or give me the BIOS-emulation bootloader?

Best Answer

Windows 7 needs BIOS INT10 to boot, in turn requiring CSM.

So, your only choice if you don't want Windows 8/10 is Linux. No need to even disable Secure Boot thanks to the Linux foundation shim most distros ship with.

There are also reported hacks to make 64 bit OS load.

EDIT: it turns actually out there exists hacks for booting without CSM!

EDIT2: UefiSeven has you covered completely now.

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