| Problem | Possible Cause | Solution | |---------|----------------|----------| | | Missing/corrupt driver | Uninstall device, scan for hardware changes, reinstall driver | | Card reader not detected at all | Disabled in BIOS/UEFI | Enter BIOS → Check onboard devices → Enable card reader | | SD card reads but not microSD | Poor contact or driver LUN issue | Clean card slot, update driver, test another card | | Drive letter missing | Conflict with network drives | Disk Management → Assign a new drive letter | | Error "Device cannot start (Code 10)" | Power management issue | Device Manager → Properties → Power Management → Uncheck "Allow the computer to turn off this device" | | Slow read/write speeds | Old USB 2.0 driver or card limitation | Use USB 3.0 card reader; check card class (UHS-I vs UHS-II) | | Driver install fails with "Access denied" | Antivirus or Windows security | Temporarily disable antivirus; run installer as Administrator |
When troubleshooting, these Hardware IDs are the definitive way to identify an Alcor device in Windows Device Manager: alcor multi-card reader driver
If problems persist, consider updating your BIOS/chipset drivers and testing the card reader on another computer to rule out hardware failure. | Problem | Possible Cause | Solution |
setup.exe /S