You buy a new Fujistu Scansnap and can't install the software downloaded from the Fujitsu website and get the message "You do not have write authority for the data storage folder" it says that you don't have permission to create "C:\ProgramData\PFU\ScanSnap\Home" even though you've deleted the folder etc.

On the old cd there is a software named "ssclean.exe", however on the new scanners you have to download the following "SSHomeClean.exe" tool, currently found at this location. 

good luck