Publisher:Epson OSSupport:Windows 95/98/Me/NT/2000/XP License:Freeware Size:Null NVIDIA WDM 2.20 self-extracting file contains the Expression 636 Plug and Play driver v.3.42A for Windows 98. Note: NVIDIA WDM 2.20 driver requires a SCSI connection. After installation, Windows identifies the scanner as a GT-9500.