The scanner driver installation found at
http://www.fujitsu.com/global/support/products/computing/peripheral/scanners/fi/software/ps-ip-twain32.html
can encounter significant problems in certain situations.
Install Issues
Ensure the programs that are set in the HKLM run keys can run correctly. If they are not properly initialised for any reason then the Adobe Acrobat Scanning functionality can be impacted.
USB Port Connection Issues
The scanners do not behave as expected if they are not presented to exactly the same USB port as the scanner was originally connected to. If the scanner is unplugged and plugged into a different USB port it will not function as expected. The correct port can be found by trying each port in sequence. Do not rely on the appearance of the device in the Devices and Printers windows. It may appear as a device, but not function on all ports except the original port.
Below is the relevant passage from a forum post here which explains why this occurs.
“This is a known "feature" of Windows. Unless the device contains an unique ID string
(aka "USB serial number") Windows can't tell that it is same device in a different usb port.
Fujitsu just slashed few cents on manufacturing by not providing this ID.”
The documentation directs users to install the software, reboot and then connect the scanner. However, testing has shown that the scanner comes online correctly, without a reboot, even if it is ON and connected during the installation.
