The Biostar P4M90 M4 audio driver helps Windows communicate with the motherboard’s onboard sound hardware, enabling playback and recording through its audio connections. Installing a compatible driver can resolve missing sound devices, restore audio after a system reinstall, or address problems caused by an incorrect driver.

Key Features

• Onboard audio support: Allows Windows and compatible applications to access the motherboard’s built-in audio hardware.
• Playback and recording: Supports speaker or headphone output and available audio inputs, depending on the board’s configuration.
• Windows sound integration: Makes recognized audio devices available in system sound settings for selecting outputs, adjusting volume, and configuring recording.
• Driver maintenance: Replaces missing or mismatched audio driver components that may prevent the sound hardware from working correctly.

How to Install

1. Confirm the motherboard and Windows version. Check that your system uses the Biostar P4M90 M4, then identify your Windows edition and whether it is 32-bit or 64-bit. For Windows 11, 10, 8, or 7, verify that the individual download explicitly supports your operating system; legacy audio packages may not work on every version.

1. Download the matching audio package. Choose a driver intended for this motherboard’s audio hardware. Extract the downloaded archive, if necessary, before starting installation.

1. Prepare your system. Close open applications and consider creating a restore point. If you are troubleshooting an existing driver, note its version in Device Manager so you can roll back if needed.

1. Install the driver. Run the included setup program and follow its prompts. If the package has no installer, open Device Manager, select the audio device, choose Update driver, and browse to the extracted driver folder.

1. Restart and test the sound. Reboot if prompted, select the intended playback device in Windows sound settings, and test your speakers or headphones. If audio remains unavailable, check cable connections, mute settings, and whether onboard audio is enabled in the BIOS.

Common Issues and Fixes

• Chipset/onboard driver install fails on newer Windows: The P4M90 M4 uses VIA P4M900-era drivers. Run the Biostar package as administrator in compatibility mode for XP/Vista/7, and install the chipset INF before VGA, audio, or LAN drivers.
• Onboard devices not detected: Confirm onboard VGA, audio, and LAN are enabled in BIOS. Install the chipset driver first, reboot, then install the VIA Chrome9 graphics and Realtek/VIA audio/LAN drivers matching your board revision.
• Version conflicts after Windows Update: Remove existing VIA/Realtek driver packages before installing the Biostar revision-specific set. Avoid mixing generic VIA Hyperion drivers with Windows-supplied chipset drivers; reboot between removals and installs.