Mustek ScanExpress A3 USB Scanner (early version) on Windows 7

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Update 2nd September 2016: This scanner is now supported in VueScan (it was added in version 9.5.39 which was released earlier this year).  This works with no fuss on Windows 7, 8.1 and 10, and has a better interface than the Mustek software.  VueScan Standard Edition costs $39.95 (approx £30) which is much cheaper than a new A3 scanner. Visit www.hamrick.com for more details.


There appears to be several versions of the Mustek ScanExpress A3 USB scanner. Drivers for some later ones (with 600, 1200 or 2400 in the name) are available on the Mustek website here http://www.mustek.de/en/service-a-drivers-3.html.

However the drivers for the earlier version (with no number in the name) seem to be almost impossible to find, and there are no Windows 7 drivers available. The Windows Vista driver can be made to work on Windows 7 (32 bit and 64 bit) with some tweaking. The information and driver are here, along with the Windows XP driver in case anyone still needs that.

Click here to download the Windows Vista driver
Click here to download the Windows XP driver

To confirm it is the right scanner for these drivers and instructions, check in Windows Device Manager. It should be shown as “USB Scanner” in “Other Devices” with an exclamation mark icon indicating no driver. Check the device properties and it should have these Hardware IDs:

  • USB\VID_055F&PID_0210&REV_0100
  • USB\VID_055F&PID_0210

To install on Windows 7 follow the steps below:

  1. Plug the scanner in and let Windows fail to find a driver. Leave it plugged in.
  2. Copy the Windows Vista installer to the desktop (it won’t install correctly if it’s not on the C: drive).
  3. Right-click it and choose Properties, Compatibility. Set to run in compatibility mode for Vista SP2 and run as an administrator.
  4. Now run the installer.
  5. When prompted about unknown drivers choose “Install this driver software anyway”.
  6. Restart Windows when prompted.
  7. The shortcuts folder may be on the desktop or elsewhere, and not in start menu – if so move to the right place.
  8. (Optional) Remove “Watch” from the startup folder as it isn’t needed for using the TWAIN driver from other software.
  9. (Optional) Run msconfig and remove “Watch Dog” and “Gtwatch” in the Startup tab as they also aren’t needed for TWAIN.

The TWAIN driver should now work from any image editing/management software. The WIA driver won’t work even though it’s listed.

These drivers and information are offered on an ‘as-is’ basis with no guarantee that they will work correctly etc. Please carry out your own tests before using it. No liability is accepted for any errors or damage however caused.

Windows 8.1

I am very grateful to Mike Parkes for the following information regarding using this scanner and driver with Windows 8.1:

I have installed the scanner on a 64 bit Windows 8.1 system. The install does not load the device driver, you have to use the Advanced Startup app in Windows 8.1, and reboot the computer with Advanced Startup options enabled and select “Disable Driver Signature Enforcement” mode. The driver can be installed using the update device driver option in Device Manager by pointing to C:\Windows\Temp\Vista