Search for Umax_USC_5800_Vista_Driver.zip (from reputable archive sites like DriverGuide or Umax’s FTP archive – use caution with EXE files). The file name is typically Umax_5800_Vista32.exe (for 32-bit) or a generic TWAIN package.

: Most original UMAX drivers were 32-bit. If you are running a 64-bit version of Windows 10

The most reliable way to use legacy UMAX scanners on modern systems is through VueScan . This software includes reverse-engineered drivers for over 57 UMAX models, including many in the Astra and USC series.