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The hardware ID ACPI\NSC6001 refers to the National Semiconductor (NSC) GEODE SCx00 Power Management Controller.
If you are seeing this in your Device Manager under "Other Devices" as an "Unknown Device," it means Windows does not have the generic driver for this specific power management interface.
There are three main methods to resolve the missing driver issue.
Microsoft sometimes pushes legacy drivers via Windows Update.
For more specific help, provide:
Would you like help locating a driver for a particular vintage board (e.g., Advantech PCM-5820, IEI Rocky-3702EV)? acpi nsc6001
The hardware identifier ACPI\NSC6001 (often seen as ) refers to the National Semiconductor IrDA Fast Infrared Port
. If you see this listed as an "Unknown Device" in your Windows Device Manager, it means your computer has an infrared sensor that lacks the necessary driver to communicate with the operating system. Identification and Function
The "ACPI" prefix indicates that the device is managed via the Advanced Configuration and Power Interface
, which handles power management and device discovery between your hardware's BIOS and Windows. The "NSC" tag identifies the manufacturer as National Semiconductor Microsoft Learn
Specifically, this ID belongs to infrared communication chips like the The hardware ID ACPI\NSC6001 refers to the National
series. In the early-to-mid 2000s, these ports were common on laptops for: Wireless Data Transfer : Sending files between laptops or early PDAs. Peripheral Connection : Connecting to infrared-enabled printers or keyboards. Why It Appears as "Unknown"
This device is most frequently found on legacy or budget-friendly laptops from the mid-to-late 2000s, such as the Acer Extensa 4620 , 5220, or 5620 series.
When users upgrade these machines to newer operating systems like Windows 7, 8, or 10, the system often fails to automatically identify the infrared port because modern hardware has largely replaced infrared with Bluetooth and Wi-Fi. How to Resolve the Issue
If you need to clear the "Unknown Device" error in your Device Manager, you have two primary options: Install the Driver
: You can find the driver by searching for the "National Semiconductor IrDA" driver on the Microsoft Update Catalog Acer Support Page for your specific laptop model. Disable the Device If you are seeing this in your Device
: Since infrared technology is rarely used today, most users simply right-click the "Unknown Device" in Device Manager and select
Based on the hardware ID ACPI\NSC6001, this guide will help you identify, troubleshoot, and install the correct driver for this device.
"The driver \Driver\WUDFRd failed to load for device ACPI\NSC6001."
This occurs when Windows Update tries to assign a modern driver (like Windows User-Mode Driver Framework) to a legacy device that isn't compatible.
The ACPI NSC6001 error is not a hardware failure. It is a software configuration problem rooted in Windows' Plug and Play driver database.