Scanning to your pc with the Samsung clx-3170/3175 series can be a pain in the ass, so here is the ultimate solution to get it work under any version of windows (xp/vista/7).
As the scan driver is not always easy to find for some reason I’ve uploaded it.
Start with downloading the right driver : scan2pc.exe
[Filesonic Download]
[Hotfile Download]
(ignore the stupid message, you find the link at the bottom of the page, these are the original clean drivers from Samsung’s website)
And follow the steps to create a connection to your scan <> pc: