A free compatibility list for Windows compatible operating systems https://www.ntcompatible.com/compatibility/ 1 2000-03-01T11:00:00+00:00 Acer 620U USB Scanner 1/compatibility/report/acer-620u-usb-scanner/ Acer Acer Hardware/General Windows 2000 2000-03-01T11:00:00+00:00 Anonymous Windows 2000 5 You Must uninstall any old beta drivers. This is done by removing C:WindowsinfOEM0.inf (if exists) and C:WindowsinfOEM0.pnf (if exists) You also need to remove the scanner from the device manager. Then install Mirascan 3.40 and reboot the computer. It will PNP the scanner. Works under Photoshop 5.5 and PaintShop Pro 5. http://www.api.com.tw/products/imaging/service/driver/Win2000/MIRA340U.exe  https://www.gnu.org/licenses/lgpl-3.0.html