I lost my installation disk Adobe Acrobat version 9 that came with the ScanSnap S1500 that I bought at the end of 2010. Where can I download Adobe Acrobat again, knowing I have my serial number for version 9?
Generally there is no such download. As long as you have your serial number, you may be able to get help from Adobe (they are not here in general). I am not sure if the CD is locked to a specific number. If not, you might be able to borrow a copy from a friend and reinstall with your number.