Difference Between UEFI And Legacy Boot
UEFI Version Legacy Boot
UEFI Version Legacy Boot is the boot process used by BIOS firmware. UEFI boot is the boot process used by UEFI firmware. The firmware maintains a list of valid boot volumes called EFI Service Partitions. During the POST procedure the UEFI firmware scans all of the bootable storage devices that are connected to the system for a valid GUID Partition Table. The firmware maintains a list of installed storage devices that may be bootable (Floppy Disk Drives, Hard Disk Drives, Optical Disk Drives, Tape Drives, etc…) and enumerates them in a configurable order of priority.
How to Uninstall Windows 8, Install Windows 7 on Your PC
In addition to the expected BIOS wrangling, drive formatting, and reinstalling device drivers, Microsoft has actually added extra layers of complexity. The BIOS has the added obstacle of the Unified Extensible Firmware Interface. And finally, manufacturers are spotty at best when it comes to offering Windows 7 drivers and rarely support users in making the switch. If you don’t want to remove Windows 8 completely but still want to have your familiar Windows 7 experience, want to avoid compatibility issues with programs and games, or need a feature that’s gone missing in the new OS, there are other options. Your best bet is actually running Windows 7 on a virtual machine and we can suggest several.
Enabling UEFI Boot Mode
On PCs and laptops from most manufacturers, including Dell, HP, Asus, Acer, Toshiba, Lenovo, and more, Legacy Boot can be disabled or turned off from the EFI setup/configuration feature, available immediately after turning on your PC. On most EFI computers, you’ll need to access EFI setup immediately after turning on your PC in order to see the option of enabling UEFI boot, usually as an option under the boot options section of the BIOS configuration.
Turning off Legacy Boot Support
Legacy Support (On/Off or Enabled/Disabled)
Boot Device Control
Legacy CSM (On/Off or Enabled/Disabled)
Launch CSM (On/Off or Enabled/Disabled)
CSM (On/Off or Enabled/Disabled)
UEFI/Legacy Boot (Both/Legacy Only/UEFI Only)
Boot Mode (Legacy Support/No Legacy Support)
Boot Option Filter (UEFI and Legacy/UEFI First/Legacy First/Legacy Only/UEFI Only)
UEFI/Legacy Boot Priority (UEFI First/Legacy First/Legacy Only/UEFI Only)
You’ll Need to Access These Options From Within Windows
Access Low-Level UEFI Settings
To access the UEFI Firmware Settings, which are the closest thing available to the typical BIOS setup screen, click the Troubleshoot tile, select Advanced Options, and select UEFI Firmware Settings.
Disable Secure Boot
The UEFI settings screen allows you to disable Secure Boot, a useful security feature that prevents malware from hijacking Windows or another installed operating system.
Boot From Removable Media
To boot your computer from removable media. Select the Boot Device option and choose the device you want to boot from. Depending on the hardware your computer has, you’ll see a variety of options like USB drive, CD/DVD drive, SD card, network boot, and so on.
Access Hardware Information
UEFI settings screen may or may not offer the ability to view information about the hardware inside your computer and its temperatures.
Change Hardware Settings
The BIOS has traditionally offered a variety of settings for tweaking system hardware overclocking your CPU by changing its multipliers and voltage settings, tweaking your RAM timings, configuring your video memory, and modifying other hardware-related settings.
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