Can I use UEFI on this laptop?

Heitor7 20 Reputation points
2026-09-12T16:26:30.86+00:00

I have an Asus K43U laptop that have an Radeon HD 6290 IGP integrated GPU on it, the GPU-Z showed up that this GPU dosent support UEFI, but in the BIOS there is an option to enable UEFI. I am reinstalling Windows 10 on this laptop. Can I use UEFI without problems?

Screenshot_1

GPU

Windows for home | Windows 10 | Install and upgrade
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Ivan B 123.3K Reputation points Independent Advisor
2026-09-12T17:11:06.1466667+00:00

Hi,

You can rest assured—you can use UEFI on this laptop even though the integrated GPU indicates it isn't supported; that refers to the boot mode itself.

However, when you enable UEFI boot, Windows needs to be set up for UEFI mode. I believe yours is currently in Legacy mode, so enabling UEFI might prevent Windows 10 from booting. Check if your drive (PO:ST9235) still appears in the boot list after enabling it, since it is a Legacy boot device.

If it doesn't appear, simply disable UEFI Boot in the BIOS again.

Thanks.

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  1. AI answer

    2026-09-12T16:26:53.3166667+00:00

    Yes. If the laptop firmware has a UEFI Boot option, Windows 10 can be installed in UEFI mode.

    The GPU-Z result is not the deciding factor for Windows installation mode. What matters is whether the firmware supports UEFI and whether the system can boot the installation media in UEFI mode. Older devices can support either BIOS or UEFI depending on firmware configuration, and Class 2 devices can behave as either BIOS or UEFI systems.

    A few important points:

    1. UEFI support is determined by the laptop firmware Your BIOS screen shows a UEFI Boot setting, which indicates the laptop firmware supports UEFI booting.
    2. Windows 10 supports UEFI Windows 10 supports both x86 and x64 versions of UEFI.
    3. For reinstalling Windows 10, boot the installer in UEFI mode In the firmware boot menu, choose the boot entry that is labeled with UEFI, such as UEFI: USB Drive. If both BIOS and UEFI entries appear for the same USB, select the UEFI one.
    4. Disk layout must match the boot mode To install in UEFI mode, the drive should be prepared as GPT. If installation media is booted in the wrong mode, Windows installation can fail.
    5. Changing firmware mode can introduce complications Microsoft notes that switching between Legacy BIOS/CSM and UEFI is not required for upgrade and that changing firmware and file systems can introduce complications. For a clean reinstall, this mainly means the install media boot mode and disk partition style must match.
    6. Secure Boot and legacy option ROMs On older hardware, some legacy components may rely on Compatibility Support Module (CSM). When Secure Boot is enabled, legacy ROMs and CSM execution are prohibited. If only UEFI boot is being used for Windows 10 installation, that is generally fine, but mixed legacy boot components can matter on older systems.

    If the goal is a clean Windows 10 reinstall in UEFI mode, the practical path is:

    1. Enable UEFI Boot in firmware.
    2. Boot the Windows installation USB using the UEFI boot entry.
    3. Install to a GPT disk.
    4. After installation, confirm the mode if needed. In WinPE, reg query HKLM\System\CurrentControlSet\Control /v PEFirmwareType returns 0x2 for UEFI and 0x1 for BIOS.

    Caution: changing boot mode or repartitioning the disk can prevent the current installation from booting and may erase data during reinstall.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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