UEFI firmware settings—often still called BIOS settings—control how a computer starts and how it detects hardware. The key for opening them during startup varies by manufacturer and model, so a single universal list can be misleading. On many computers a key such as F2, Delete, Esc, or F10 is used, but check the exact instructions from your PC maker. Windows also provides an Advanced Startup route on supported systems.
Open firmware settings from Windows
Save your work and close open apps first. In Windows 11, open Settings, choose System, then Recovery. Under Advanced startup, select Restart now. After the restart, choose Troubleshoot, then Advanced options, then UEFI Firmware Settings, and select Restart. The computer should open its firmware interface. Menu names may differ slightly by Windows version, device policy, or manufacturer. If you do not see UEFI Firmware Settings, consult your PC maker’s support documentation; the option may be unavailable on some configurations.
Use the manufacturer’s startup key
If Windows cannot start, or if the firmware menu is not offered, use the model-specific key or button described by the manufacturer. Some PCs briefly show a setup prompt during startup. Press the documented key as soon as the computer powers on; timing can matter, and fast startup may make the window difficult to catch. For brand-specific instructions, search the official support website using the exact model name or service tag. Avoid generic “BIOS key” downloads and utilities from third-party sites.
Take care before changing options
Opening firmware settings is usually only an inspection step; changing settings can affect whether Windows boots. Do not switch between Legacy/CSM and UEFI modes, alter storage controller modes, or change Secure Boot just to experiment. Such changes can make an existing installation inaccessible or trigger a recovery prompt. If device encryption or BitLocker is enabled, make sure you know where to retrieve the recovery key before changing boot or security settings. Change only the option required for a specific troubleshooting task, and record its original value first.
Secure Boot and current Windows guidance
Microsoft describes Secure Boot as a feature that helps stop malicious software from loading during startup by allowing trusted, digitally signed boot software. Its availability depends on firmware configuration and hardware. If you are enabling it to meet a Windows requirement, follow Microsoft’s current instructions and your manufacturer’s guide for the exact PC. If a device is managed by work or school, ask its administrator before changing firmware security settings.
Manufacturer instructions are the reliable source for model-specific keys and options. Use Windows Advanced Startup when available, and keep firmware changes limited to a clearly understood goal.
Related reading: BIOS and UEFI Passwords: What They Protect and What They Don’t.
