Can you provide more information? See
hereIt would be helpful to know the "exact" messages you see when the scan functions fail. Anything like these
Error messages.
What is make/model number of computer if "brand name", otherwise make/model number of motherboard?
How much physical memory does the computer have?
Are you using the latest software and/or drivers for the Scanjet? From Microsoft or HP?
Did the Scanjet 2400 ever work well on this computer and operating system?
What interface are you using and how/where is it connected to the computer? USB 1.1, USB 2.0, something else?
Are you using the interface cable that came with the Scanjet?
Is there a lot of other software loaded and/or running in memory while you're attempting these scan functions?
Do you have Internet Explorer 7 installed?