If your device is not being detected, follow these steps in order.
For older machines:
If you plug the drive in and Windows says "USB Device Not Recognized," the issue is usually hardware, not software.
If you cannot format the drive using Windows tools, the AU6370 controller has likely locked the drive because it detected bad sectors in the NAND flash. To remove write protection:
Critical Notice: Avoid "driver updater" scam websites. Never download an .exe from a pop-up ad. Stick to official or verified repositories.
The Alcor AU6370 controller is legacy hardware, but it is still supported across a wide range of Windows operating systems:
Looking for the Alcor AU6370 USB card reader driver for Windows? Here's a quick guide to help you install and get it working.
What it is
Driver options
Installation steps (Windows 10/11, assume automatic)
Manual driver install (Windows 7/8.1 or if automatic install fails)
Troubleshooting
Safety tips
If you want, I can:
The Alcor AU6370 is a legacy USB 2.0 card reader controller commonly found in older laptops and external multi-card readers. While Alcor Micro does not provide a direct consumer-facing download portal, drivers are widely available through major PC manufacturers who integrated this chip into their systems. Driver Overview
The AU6370 driver is essential for Windows to recognize and interact with memory card formats such as SD, microSD, and MMC.
Supported Systems: Most drivers support Windows XP through Windows 10 and 11 (64-bit).
Hardware ID: This chip typically identifies as USB\VID_058F&PID_6370.
Latest Stable Version: While many third-party repositories host version 1.0.38.134, more recent updates (up to 2026) for related Alcor card readers are maintained by OEMs like Lenovo. Recommended Official Sources
For the most stable and secure installation, it is best to use drivers provided by major manufacturers, even if your device is from a different brand, as the underlying Alcor hardware is often the same.
Lenovo Support: Offers the most recently updated Alcor Micro drivers (released as recently as February 2026) which are compatible with modern Windows 10 and 11 environments. Alcor SmartCard Reader Driver (Feb 2026) Alcor Micro USB 2.0 Card Reader Driver (ThinkCentre)
HP & Dell: Older systems like the HP Pavilion often use Alcor controllers; checking their support pages with your specific serial number is recommended. Installation Guide
If you are using a generic or older reader that Windows fails to recognize automatically:
To find the right driver for your Alcor AU6370 (often used in USB 2.0 card readers), the best approach is to source it from your laptop manufacturer rather than a generic third-party site. Where to Find the Official Driver
Since Alcor AU6370 chips are widely used by major OEMs, you can download verified drivers from their support pages: Lenovo Support : They provide a reliable Alcor Micro USB 2.0 Card Reader Driver Alcor Au6370 Driver Windows
for Windows 10 (64-bit). Although listed for specific ThinkCentre models, these drivers are often compatible with the generic AU6370/AU6477 series. HP Support
: For HP laptops, search for the "Alcorlink Card Reader Driver" under the section of the HP Software and Driver Downloads Troubleshooting "Not Working" Issues
If the driver is installed but the card reader still isn't showing up, try these common fixes: Check for "Code 38"
: This error occurs when a previous instance of the driver is stuck in memory. Restarting your computer usually clears this. Enable Hidden Devices Windows Key + R devmgmt.msc , and hit Enter. View > Show hidden devices Look under Memory technology devices
. If the Alcor driver has a yellow exclamation mark, right-click and select , then restart to let Windows reinstall it automatically. Physical Cleaning
: If the device is detected but won't read cards, use a small amount of isopropyl alcohol
on the card's gold contacts or check the slot for dust/debris. Technical Insight
is a legacy chip that takes SD/MMC pins as input and acts as a USB bridge. Most modern versions of Windows (10/11) have built-in "USB Mass Storage" drivers that should handle these basic readers automatically. If manual installation is required, ensure you choose the driver version matching your OS build (e.g., version 1903 or later). Are you having trouble detecting the device itself, or is it just failing to read a specific SD card
Problems regarding Alcorlink usb 2.0 card reader - HP Community
Alcor AU6370 is a high-performance USB 2.0 card reader controller
designed for multi-slot internal or external devices. In modern Windows environments (Windows XP through Windows 11), the chipset is generally plug-and-play
and does not require manual driver installation for basic functionality. HP Support Community Technical Specifications Alcor Micro AU6370 Interface: High-speed USB 2.0 (up to 480 Mbps). Supported Cards: If your device is not being detected, follow
Secure Digital (SD, SDHC, MicroSD), MultiMediaCard (MMC), Memory Stick (Pro, Duo, MagicGate), CompactFlash (CF), and xD-Picture Card. Hardware Features:
Built-in 3.3V to 1.8V regulator, LED status indicator, and hot-swappable support. Driver Compatibility for Windows
Most users will find that Windows identifies the device automatically as a "USB Mass Storage Device." However, specific drivers may be needed for proprietary features or hardware integration by manufacturers like HP. HP Support Community Windows 10 & 11:
Drivers are typically managed via Windows Update. If the reader fails to detect cards, users should look for the "Alcorlink PCIE Card Reader" or "Alcor Micro Card Reader" under Memory Technology Devices in Device Manager. Windows 7 & Legacy:
While native support exists, older versions may benefit from the official Alcor Micro Driver Package to ensure all slot types are correctly mapped. Windows 98 SE: This is the only modern-era operating system that a manual driver installation for the to function HP Support Community Troubleshooting card reader is not working on a newer Windows system: Check Device Manager:
Look for a yellow exclamation mark under "Universal Serial Bus controllers" or "Memory Technology Devices". Update via Manufacturer: If you are using a pre-built PC or laptop, visit the HP Software and Driver Downloads
page (or your specific OEM's site) to download the certified "Alcorlink" driver. Manual Update: Right-click the device in Device Manager, select Update Driver
, and choose "Browse my computer for drivers" if you have a downloaded HP Support Community Are you experiencing a specific error code or is the card reader simply not appearing in File Explorer?
The Alcor AU6370 is a single-chip solution primarily used for USB smart card readers, frequently found in devices like the Lenovo ThinkPad Yoga 370. Drivers, such as version 1.7.46.0, are essential for enabling secure authentication and fixing hardware recognition issues on Windows 10 (64-bit). For more information, visit Softpedia.
The Alcor AU6370 is a highly integrated USB 2.0 Flash Disk Controller chip commonly found in generic USB flash drives, card readers, and MP3 players. If you have plugged a device into a Windows computer and found it unresponsive, or if Windows Update fails to find the necessary software, you likely need to understand how the AU6370 driver works.
This guide covers the current status of the driver, how to install it on modern versions of Windows, and how to use the specialized formatting tools required for this controller.