Click on (if available) and expand the Driver updates section.
Uncheck . Click OK and restart the system. 3. SD Cards Show as Write-Protected
If the native driver fails, you can use specialized drivers provided by PC manufacturers like or Toshiba , which often use Alcor chips in their hardware:
Open Device Manager, right-click your Alcor reader, select Properties , go to the Driver tab, and click Roll Back Driver . 3. SD Cards are Write-Protected Alcor Au6370 Driver Windows
Here’s a concise, informative review of the , written from a typical user’s perspective.
: Right-click the device in Device Manager, choose Uninstall device , and restart your PC. Windows will clean-reinstall the driver upon rebooting. Hardware is Not Detected at All
Windows Update hosts many legacy Alcor drivers in its optional updates catalog. Press and select Device Manager . Click on (if available) and expand the Driver
If your computer is not recognizing an SD card, MicroSD card, or Memory Stick, you likely need to install or update the driver for this specific controller.
These operating systems require a dedicated OEM driver package from Alcor to recognize the card reader functionality fully.
Windows often carries certified Alcor drivers in its central repository. Right-click the and select Settings . SD Cards are Write-Protected Here’s a concise, informative
The latest drivers are available via the Microsoft Update Catalog, with updates appearing periodically for Windows 11 25H2 and later.
Windows power management may be shutting down the controller to save energy.
Your (e.g., Windows 11, Windows 10 64-bit)
Windows includes generic USB mass storage drivers that can sometimes run the AU6370 chip. However, installing the dedicated Alcor driver is critical for several reasons:
Search the support site of brands like Realtek, HP, Dell, or Lenovo for their "Alcor Multi-Card Reader Driver" packages. These packages usually include a convenient Setup.exe installer. Troubleshooting Common AU6370 Errors Error: "Device Descriptor Request Failed" (Code 43)