How to disable Fast Boot in BIOS or UEFI

To disable firmware Fast Boot, enter your computer's BIOS/UEFI setup, find Fast Boot in its boot settings, set it to Disabled and save the change. The exact menu and setup key depend on the manufacturer and model.

This can help when startup happens too quickly for a supported boot or recovery shortcut. It is not a universal requirement for entering Windows Recovery Environment, and it does not repair a damaged Windows installation by itself.

Fast Boot and Fast Startup are different

Setting	Where it is controlled	When to check it
Firmware Fast Boot	BIOS/UEFI setup	When firmware startup skips or shortens checks and a documented boot shortcut is difficult to use
Windows Fast Startup	Windows power settings	When troubleshooting Windows shutdown/startup behavior

If you meant the Windows option, use this Fast Startup guide. Changing it is separate from the firmware procedure below.

Before entering firmware setup

Find your model's documented setup key and recovery shortcut.
Record the current Fast Boot setting so you can restore it later.
Keep the computer on reliable power.
If the device uses BitLocker, make sure its recovery key is available before changing firmware settings.

Do not change storage-controller mode, Secure Boot, boot order or other unrelated settings while looking for Fast Boot. If you cannot find the option, consult the model manual rather than resetting the firmware.

ASUS example: text-style setup

Enter BIOS/UEFI setup using the model's documented procedure.
Use the arrow keys to open the Boot tab.
Select Fast Boot and choose Disabled.
Use the displayed Save & Exit command. On many ASUS models, this is F10.
Review the changes being saved and confirm.

ASUS example: graphical UEFI setup

If necessary, switch to Advanced Mode. Some ASUS interfaces use F7 for this.
Open Boot and set Fast Boot to Disabled.
Save and exit using the command shown by that firmware.

ASUS documents these interface variations in its Fast Boot support guide. A graphical interface and mouse support are not required on every UEFI system.

Retry the intended boot or recovery action

After the computer restarts, try its documented recovery or boot-menu shortcut. ASUS models can use different recovery keys, including F9 or F12; F9 is not a universal notebook shortcut. ASUS's WinRE instructions explain the supported routes.

If Windows still starts normally, use its advanced-startup options rather than racing a startup key. If a recovery shortcut still fails, investigate the model's procedure and recovery availability instead of repeatedly changing unrelated firmware settings.

For additional firmware context, see Fast Boot in UEFI settings. Once troubleshooting is complete, you can return to the same menu and restore the original setting if appropriate.