Windows support of UEFI

What is UEFI?

When the devices starts, the firmware interface controls the booting process of the PC, and then passes control to Windows or another operating system.

UEFI is a replacement for the older BIOS firmware interface and the Extensible Firmware Interface (EFI) 1.10 specifications.

More than 140 leading technology companies participate in the Unified EFI Forum, including AMD, AMI, Apple, Dell, HP, IBM, Insyde, Intel, Lenovo, Microsoft, and Phoenix Technologies.

Benefits of UEFI

Firmware that meets the UEFI 2.3.1 specifications provides the following benefits:

  • Faster boot and resume times.
  • Ability to use security features such as Secure Boot and factory encrypted drives that help prevent untrusted code from running before the operating system is loaded. For more information, see Secure Boot Overview and Factory Encrypted Drives.
  • Ability to more easily support large hard drives (more than 2 terabytes) and drives with more than four partitions.
  • Compatibility with legacy BIOS. Some UEFI-based PCs contain a Compatibility Support Module (CSM) that emulates earlier BIOS, providing more flexibility and compatibility for end users. To use the CSM, Secure Boot must be disabled.
  • Support for multicast deployment, which allows PC manufacturers to broadcast a PC image that can be received by multiple PCs without overwhelming the network or image server.
  • Support for UEFI firmware drivers, applications, and option ROMs.

Additional advantages are described in the Intel EFI and UEFI Overview and Specifications.

Windows support of UEFI

The following Windows editions include support for UEFI:

  • Windows 10 for desktop editions (Home, Pro, Enterprise, and Education), Windows Server 2016 Technical Preview, Windows 8.1, and Windows 8 support native UEFI 2.0 or later on 32-bit (x86), 64-bit (x64), and ARM-based PCs. They also support BIOS-based PCs, and UEFI-based PCs running in legacy BIOS-compatibility mode.

    Some features such as Secure Boot require UEFI 2.3.1 Errata C or higher.

  • 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.
  • Windows 7 and Windows Server 2008 R2:
    • Support UEFI 2.0 or later on 64-bit systems. They also support BIOS-based PCs, and UEFI-based PCs running in legacy BIOS-compatibility mode.
    • Support on Class 2 systems running in legacy BIOS-compatibility mode by using a CSM, so they can use the legacy BIOS INT10 features.
    • Are 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.
    • Windows Server 2008 R2 also supports EFI 1.10 on Itanium-based systems.

  • While in UEFI mode, the Windows version must match the PC architecture. A 64-bit UEFI PC can only boot 64-bit versions of Windows. A 32-bit PC can only boot 32-bit versions of Windows. In some cases, while in legacy BIOS mode, you may be able to run 32-bit Windows on a 64-bit PC, assuming the manufacturer supports 32-bit legacy BIOS mode on the PC.
  • Windows supports a subset of the functionality that is defined in the UEFI specification. Windows implementations do not explicitly check against higher revisions of the firmware
  • For additional UEFI requirements, see UEFI Installation Media Format and default boot behavior and UEFI Requirements: Boot time, Runtime, Hibernation State (S4).

three activities in building software

1. “First make it work.” You are out of business if it doesn’t work. 2. “Then make it right.” Refactor the code so that you and others can understand it and evolve it as needs change or are better understood.

3. “Then make it fast.” Refactor the code for “needed” performance.

Striped Volumes

Striped volumes improve disk input/output (I/O) performance by distributing I/O requests across disks. Striped volumes are composed of stripes of data of equal size written across each disk in the volume. They are created from equally sized, unallocated areas on two or more disks. In Windows Server 2003, the size of each stripe is 64 kilobytes (KB) and cannot be changed.

Striped volumes cannot be extended or mirrored and do not offer fault tolerance. If one of the disks containing a striped volume fails, the entire volume fails, and all data on the striped volume becomes inaccessible. The reliability for the striped volume is less than the least reliable disk in the set.

From Microsoft Technet

Related products:

Related topics:

Spanned Volumes

Spanned volumes combine areas of unallocated space from multiple disks into one logical volume. The areas of unallocated space can be different sizes. Spanned volumes require two disks, and you can use up to 32 disks. When creating spanned volumes, keep these points in mind:



DisplayLink and Windows 10

DisplayLink and Windows 10

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DisplayLink technology is fully supported on all current versions of Windows 10 (Intel and AMD CPUs). In the summer of 2016, the DisplayLink architecture on Windows 10 was improved. This changes the behaviour and installation methods. The details of this are covered below:

Windows 10 Anniversary Update requires our driver v8.0 or above. The latest driver can be downloaded from our website.

Note: When upgrading to Windows 10 Anniversary Update from a previous version of Windows, you will be notified that the DisplayLink driver will be uninstalled. This is expected, and desired as the driver must also be upgraded (either from Windows update or using the driver from our website) to the new Windows architecture, once the system has upgraded. You can safely ignore the message about compatibility.

What has changed in the Windows 10 DisplayLink driver?

DisplayLink has been working with Microsoft on extending the Windows graphics architecture to support USB graphics on Windows. A new interface has been designed between Microsoft and DisplayLink for USB displays. This is available in Windows 10 Anniversary Update 2016 (Redstone) from August 2016. The DisplayLink software uses the new native DisplayLink USB graphics support on Windows 10 Anniversary Update 2016 onwards to provide a forward compatibility with Windows. There is no change to Windows 10 Threshold and earlier OS versions. The table summarises the DisplayLink driver compatibility:

Windows 10 Threshold 1

Windows 10 Threshold 2

Windows 10 Anniversary Update (Redstone 1)

Windows 10 Creators Update (Redstone 2)

Windows OS Build version

How to find the Windows build number

< 10.0.10586

> 10.0.14393

Windows 10 “version”

v1507 and v1511

v1607 and newer

DisplayLink driver minimum version to use



V8.0 or later will be installed by Windows Update on Windows 10 Anniversary Update. Running the DisplayLink installer, from the DisplayLink website will also automatically install the appropriate driver for the Windows 10 version you are running.

You MUST NOT try to install DisplayLink driver 7.9 on Windows 10 Anniversary Update and newer. Similarly you MUST NOT deploy DisplayLink_Win7-10TH2.msi when you are using a Redstone build. Changes in the Windows driver model can then prevent your computer from booting!

Windows 10 Anniversary Update changes

The following driver differences will be see when using the DisplayLink driver from Windows 10 Anniversary Update 2016

Device Manager

DisplayLink displays appear under “Display Adapters” in Device manager, rather than under “USB Display Adapters”:

DisplayLink System Tray Icon

On Windows 10 Anniversary Update 2016, the DisplayLink icon is always present in the Windows system tray (from V8.0 M2). The UI options are currently reduced while support is added to the new driver architecture.

First Connect Behaviour

On Windows 10 Anniversary Update 2016, on first connect, DisplayLink displays are configured by the Windows OS. The Windows OS behaviour is to:

▪ Desktop PCs: Set the display to extend

▪ Laptops and Tablets: Set the display to clone

This behaviour is no longer overridden by the DisplayLink driver.

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Important information on macOS 10.13.4 update

DisplayLink and Windows 10

DisplayLink support for Chrome OS now available

DisplayLink support for Ubuntu now available

Which operating systems does DisplayLink currently support?

Which DisplayLink products support UHD (4K) modes?

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