When I see this, I often find the OS isn't fully installed (motherboard/USB drivers) or the USB ports are not installed. All this and more at http://www.usbman.com
In closing, Microsoft does not install these for us on most machines.
I just installed a Genius ColorPage-Vivid 3X USB Scanner to my WinXP operating system but it didn't work. "The Scan Manager" always pops up and says "Scanner not found!". Based on the label posted on the installation cd, WinXP is also supported by this unit. I also tried to install the downloaded driver which came from their website but I also failed. So, I tried installing this scanner to the other operating system like Win98 and WinME and it worked. Why?
Please help me fix this problem. thank you!