You can try using the Microtek Product Finder or their Installation Tool to see if a legacy driver is available for your specific serial number.

You can try downloading the Windows XP driver from a site like CNET Download and running the installer in Compatibility Mode for Windows XP (Service Pack 3) . ⚠️ Important Warnings

Most original Microtek drivers only work on 32-bit systems. If you have a 64-bit version of Windows, a standard driver likely won't work, and VueScan is your best bet.

This is a third-party application that includes its own reverse-engineered drivers. It is widely considered the best way to get old scanners like the ScanMaker 4800