For users running , the problem is specific. The 64-bit architecture requires digitally signed drivers to ensure system stability. The original BenQ drivers for the 3300U do not have these modern signatures. Consequently, if you simply plug the scanner in, Windows 10 will attempt to install a generic driver, which almost always fails, leaving the device listed in Device Manager as "Unknown Device" or with a yellow exclamation mark.
The most reliable way to use this legacy scanner on Windows 10 is through VueScan .
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For users running , the problem is specific. The 64-bit architecture requires digitally signed drivers to ensure system stability. The original BenQ drivers for the 3300U do not have these modern signatures. Consequently, if you simply plug the scanner in, Windows 10 will attempt to install a generic driver, which almost always fails, leaving the device listed in Device Manager as "Unknown Device" or with a yellow exclamation mark.
The most reliable way to use this legacy scanner on Windows 10 is through VueScan .