"IMPORTANT! For those who still get the error message, read this (found on umax.de):
VistaScan Version 3.55 USB
VistaScan 355u (9 MB) http://www.umaxfirstaid.de/ftp/vs355u.exe
Optional: to install MagicMatch calibration profiles copy the folders (MONITOR, PRINTER, SCANNER) from the folder PROFILES of the original driver CD into the folder PROFILES of the downloaded and expanded current driver on your hard disk und select the appropriate components in the setup dialog.
VistaScan USB Updater for Windows 2000
Upgrades VistaScan version 3.52su and 3.55su to work under Windows 2000. VS355UP.EXE (913 KB)http://www.umaxweb.de/ftp/VS355UP.EXE
Should you experience any problems (Error 31) under Windows 2000, please download this file pv8630.sys and replace the ones in the foldes "WinNT\system32" and "WinNT\system".http://www.umaxfirstaid.de/ftp/pv8630.zip
Hope this helps. Helped me."