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Thread: What is a bootmgr.efi file?

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    What is a bootmgr.efi file?

    What is Extensible Firmware Interface (EFI)?

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    Forum Techie A_old's Avatar
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    The replacement for the BIOS (basic input/output system) in most computers today. It's a standard for the lowest level of software that interacts with and manages hardware to make it easier for operating systems to interact with the same hardware.

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    I have a Vista 32 bit and Vista 64 bit OS DVDs. In the Vista 32bit DVD, there is no bootmgr.efi file but there is that file in the 64bit.

    I wonder why 32bit doesn't have bootmgr.efi file?

  4. #4
    Elite Member TonyT's Avatar
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    Quote Originally Posted by satyre View Post
    I have a Vista 32 bit and Vista 64 bit OS DVDs. In the Vista 32bit DVD, there is no bootmgr.efi file but there is that file in the 64bit.

    I wonder why 32bit doesn't have bootmgr.efi file?
    Because of a lack of support from PC manufacturers and vendors.
    The Itanium versions of Windows 2000 (Advanced Server Limited Edition and Datacenter Server Limited Edition) supported EFI 1.1 in 2002.

    Windows Server 2003 for IA-64, Windows XP 64-bit Edition, and Windows 2000 Advanced Server Limited Edition, all of which are for the Intel Itanium family of processors, support EFI, a requirement of the platform through the DIG64 specification.[13]

    Microsoft introduced UEFI support for x64 Windows operating systems with Windows Server 2008 and Windows Vista Service Pack 1.[14][15] Microsoft claims that the lack of official support for EFI booting on 32-bit CPUs is due to lack of support from PC manufacturers and vendors. Microsoft’s migration to x64 operating systems is not supportable by EFI 1.10, since the x86-64/EM64T processor extensions required by x64 operating systems were not a supported processor binding. Support for x86-64/EM64T was added in UEFI 2.0.

    http://en.wikipedia.org/wiki/Extensi...rosoft_Windows
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    Thank both of you very much.

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