[NAME]  Legacy boot and CSM is no longer supported. The basic answer is you cannot do that EVER. Windows 7 DOES NOT SUPPORT UEFI GPT Booting. So there is no such thing as legacy boot on internal storage. [URL] legacy is gone as well as 32 bit driver support  If you want to continue you will need to find a model like 7020 7040 etc that supports 32 bit legacy os. "Windows 7 was designed 11 years ago. For Windows 7 to run on any modern silicon, device drivers and firmware need to emulate Windows 7's expectations for interrupt processing, bus support, and power stateswhich is challenging for Wi-Fi, graphics, security, and more," "OEM's make customizations to legacy device drivers, services, and firmware settings, customers have been told 7 is EOL. There will not be Windows 7 ongoing servicing."There is no more support for Windows 7 and Windows 8.1 on the newest PCs past Intel's Skylake processorsALL next-generation processors will require the "latest Windows platform and no longer have 32 bit support orCompatability Support Module (CSM)." All will be CLASS 3 UEFI. [IMAGE]GAME OVER MSDOS  
I want to install windows 7 on my new dell desktop but as I am trying to dual boot desktop again and again support assistant OS recovery is coming and in my friends acer laptop with uefi boot windows 7 is booting. My desktop is having windows 10. So what should I do.
how to install windows 7 on my dell vostro 3470 in UEFI boot