Some manufacturers bundle these system drivers with their specific "ACPI" or "Intel/AMD Chipset" packages:
If the above fails, manually download the driver. acpi ven-msft amp-dev-0101
If you have no audio power issues and just want the yellow exclamation mark to disappear: Some manufacturers bundle these system drivers with their
: If you are using Windows 7 and do not need BitLocker, you can simply Disable this in the BIOS to remove the "Unknown Device" warning from Device Manager. 2. Install the Windows 7 Hotfix (KB2920188) acpi ven-msft amp-dev-0101
: If you are using Windows 7, this device will often show as "Unknown" because Windows 7 does not natively support TPM 2.0. To fix this, you would need a specific Microsoft hotfix or to disable the TPM in your BIOS settings.