Hp pavilion uefi setup: configurations for windows 7

When it comes to setting up a Hewlett Packard Pavilion computer running Windows 7, it is important to understand the role of the UEFI (Unified Extensible Firmware Interface) and the various configurations available. In this article, we will discuss the different options for setting up the UEFI in a Hewlett Packard Pavilion computer running Windows 7, as well as the impact of these configurations on the system.

Does Windows 7 use UEFI?

Windows 7 does support UEFI, but there are certain configurations that are recommended for a Hewlett Packard Pavilion computer running this operating system. Specifically, it is recommended to use a configuration that enables the CSM (Compatibility Support Module) with UEFI boot. This is known as Config #It is important to note that Windows 7 has a dependency on Int10 support for basic display when the high-res graphics driver is not available. This dependency is satisfied by the CSM. Therefore, enabling the CSM and setting the default to UEFI boot is recommended for Windows

If the firmware defaults to UEFI boot mode with the CSM enabled, Windows 7 will install successfully in UEFI mode. Microsoft has also backported TPM 0 support to Windows 7 for when it is installed in UEFI mode. Therefore, Config #2 is the recommended configuration for a Hewlett Packard Pavilion computer running Windows

What is the partition table/disk configuration when installing Windows 7 with CSM enabled?

The partition table and disk configuration when installing Windows 7 with the CSM enabled depends on the boot devices priority defaults in the firmware. If the CSM is enabled and loaded into memory, the install media may default to Legacy MBR boot. In this case, the system will typically have two partitions: the first partition will be active and listed as the 'system partition', with a hidden \boot folder, and the second partition will be where Windows is installed.

On the other hand, if Windows is installing in UEFI mode, it will create the EFI System Partition (ESP) as a Fat32 file system, the Microsoft Reserve Partition (MSR) as RAW, and an OS/data partition using NTFS. The ESP will have an EFI boot folder, which may be hidden.

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It is important to note that if you want to install Windows 7 in UEFI boot mode, you may need to specifically select UEFI boot mode when booting to the installation media. Consult with the PC manufacturer for more information on boot options and BIOS configuration.

What is the upgrade path for Windows 7 installed with CSM enabled in Legacy boot mode?

If Windows 7 is installed with the CSM enabled in Legacy boot mode (Config #3), the upgrade path is still supported through Windows However, it is important to note that the Secure Boot feature is only available in UEFI Config #Therefore, if you desire to switch the system to UEFI boot, you will need to format and re-install the original operating system with the disk partitioned for GPT (GUID Partition Table) using UEFI boot mode. It is recommended to go straight to Config #1 (with the CSM disabled) for a pure UEFI environment and to make use of Secure Boot if the firmware supports it.

Is there any user impact when switching the Firmware from CSM enabled with Legacy BIOS boot to CSM enabled UEFI boot and vice versa?

Switching the firmware settings from CSM enabled with Legacy BIOS boot to CSM enabled UEFI boot and vice versa can have an impact on the system. If you change from Config #3 to Config #2 and then attempt to boot, the system may not boot. However, if you change back to Config #3 without any further changes to the system, disk, or OS, you should be able to boot back into the original OS using the original configuration. It is recommended to not change the BIOS setting and instead upgrade the system as it is.

However, if you want to switch from Config #2 to Config #1 to enable Secure Boot, you may encounter some issues. If the system is configured to boot using CSM's legacy BIOS for boot, you will need either Windows 10+ installation media or a clean install of the original operating system. Consult with the PC manufacturer for more information on boot options and BIOS configuration.

Can UEFI support booting from an MBR partitioned disk?

No, UEFI does not support booting from an MBR (Master Boot Record) partitioned disk. Booting from an MBR partitioned disk is only supported when booting in BIOS mode with the CSM enabled.

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What is the impact of 32-bit vs. 64-bit UEFI?

Microsoft does support both 32-bit and 64-bit UEFI. However, the bitness of the OS and the UEFI firmware must match. For example, if you have a 64-bit UEFI firmware, you must install a 64-bit Windows OS. The same goes for a 32-bit UEFI firmware and a 32-bit Windows OS.

Can firmware settings be programmatically switched?

No, most firmware settings are not standardized, and Microsoft does not offer a tool to allow for programmatically modifying firmware settings. Consult with the PC manufacturer for details, as there may be tools available for management and configuration.

How does switching from CSM enabled Legacy BIOS boot to CSM enabled UEFI boot impact Secure Boot behavior?

Secure Boot is only supported in UEFI mode with the CSM disabled. If Secure Boot was not pre-configured on the factory floor prior to the system shipping out to customers, then you may not have the option available to you. If the system did previously have Secure Boot enabled but disabled for the current Windows 7 OS, it may be as simple as disabling the CSM and enabling Secure Boot. However, if the partition was cleaned and you are not set up for UEFI boot to GPT disk, you will need to clean the disk and re-install the operating system for UEFI boot prior to turning on Secure Boot. Consult with the original equipment manufacturer (OEM) prior to making any changes to ensure your system supports Secure Boot.

What is the impact on a rollback/restore to Windows 7?

As long as there were no changes to the firmware settings, a rollback to the original operating system should work without any issues. If firmware settings were changed, it is important to change them back to the factory default before performing the rollback. Consult with the PC manufacturer to find out what type of rollback method or recovery method is included with your system.

What is the impact on WinRE?

WinRE (Windows Recovery Environment) will have the same boot process as the installed operating system. If you changed the firmware boot option from Legacy BIOS to UEFI, attempting to boot to the operating system or WinRE on disk will fail. However, if you are booting to WinRE or WinPE (Windows Preinstallation Environment) on USB/CD/DVD, this will use a separate boot method.

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What is the impact of 32-bit vs. 64-bit OS when switching from Legacy boot to UEFI and vice versa with 64-bit UEFI or 32-bit UEFI firmware?

One limitation of Windows UEFI boot is that you can only boot an OS that matches the UEFI bitness. If you have a 32-bit UEFI, you can only install a 32-bit Windows OS. On the other hand, 64-bit Windows requires a 64-bit UEFI or a CSM. However, if a system is missing a CSM, you cannot boot a 64-bit Windows OS on it.

It is important to consult with the PC manufacturer for more information on boot options, BIOS configuration options, firmware updates, and Secure Boot options.

Setting up the UEFI in a Hewlett Packard Pavilion computer running Windows 7 requires careful consideration of the different configurations available. It is recommended to use Config #2, which enables the CSM with UEFI boot, for Windows This configuration allows Windows 7 to support Int10 and provides a smooth installation process. Switching between Legacy BIOS boot and UEFI boot should be done with caution and in consultation with the PC manufacturer. Understanding the impact of these configurations on Secure Boot, partition table/disk configuration, and the boot process is crucial for a successful setup.