Intel QM77 Express Chipset LPC Controller 1E55 Driver

The Intel QM77 Express Chipset LPC Controller 1E55 driver helps Windows correctly identify the chipset’s Low Pin Count (LPC) controller and associate it with the appropriate system support. It is useful after reinstalling Windows or when Device Manager lists the controller as an unknown device. Although sometimes listed under Audio, this Intel component is part of the motherboard chipset, not a sound device, and its driver does not replace your audio driver.

Key Features

• Provides chipset identification information so Windows can display the LPC controller correctly in Device Manager.
• Helps resolve missing device identification when the cause is an absent or incorrect chipset INF package.
• Supports proper configuration of the controller using the applicable Intel chipset information and Windows system drivers.
• Can be installed as part of a compatible Intel chipset package, rather than requiring a separate audio or peripheral driver.

How to Install Intel QM77 Express Chipset LPC Controller 1E55 Driver

1. Check your system details. Confirm your Windows edition and whether it is 32-bit or 64-bit. In Device Manager, open the controller’s Properties, select Details, and check Hardware Ids for `VEN_8086&DEV_1E55`.

1. Choose a compatible package. Before starting an Intel QM77 Express Chipset LPC Controller 1E55 driver download for Windows, check the package’s supported hardware and operating systems. For Windows 11, 10, 8, or 7, compatibility depends on the specific package and computer model; a Windows 10/11 listing alone does not establish official support.

1. Download from a trusted source. Prefer the computer manufacturer’s chipset package or an applicable Intel release. Choose the latest version explicitly compatible with your system, and use a free download that does not require third-party driver-updater software.

1. Install the chipset information. Extract the download if necessary, then run its setup program as an administrator. If the package provides INF files without an installer, use Device Manager’s Update driver option and browse to the extracted folder.

1. Restart and verify. Restart if prompted, then check Device Manager for the correct device name and any remaining warning icons. If installation fails, review compatibility rather than forcing an unsupported driver.

Keep the chipset package updated when your computer manufacturer provides a relevant update for your configuration. Newer chipset INF releases may improve device identification or installation compatibility, but they do not necessarily increase performance or fix audio problems.

Common Issues and Fixes

• Install fails or rolls back: The Intel Chipset Device Software package may not include the QM77 LPC entry or may conflict with an existing INF. Run the installer as administrator; if it still fails, extract the package and manually update the “Intel QM77 Express Chipset LPC Controller 1E55” in Device Manager using Update driver > Browse > Let me pick > Have Disk, pointing to the included INF.
• Device not detected or shows as unknown: Check Device Manager for `PCIVEN_8086&DEV_1E55`. If missing or flagged, reset BIOS/UEFI to defaults, confirm the chipset is enabled, then reinstall the Intel Chipset INF. A bare Windows install often lacks this INF.
• Version conflicts: Remove older OEM Intel Chipset Device Software first, delete the LPC device, and rescan. Use a package that explicitly supports QM77 and your Windows version; avoid forcing a newer generic INF over an OEM-matched one.