Quite a bit of trouble getting the old Epson 3170 scanner going. The auto-thingie said that it hadn't got anything for me, but offered to go looking elsewhere.
Sk/Eps site offered a Vista 32bit file which I down loaded. It crashed on install, leaving some detritus about, but nothing to 'Uninstall'. I cleaned it up and went for the Second option - this time mentioning Vista 32bit and Twain. This time a much bigger file arrived which unpacked into many scanner model options. I picked the 3170, and away it went.
Epson 12180.exe is the zipped file
The software is improved according to the blurb. Certainly, the way in which you select the destination drive and folder now has its own button with a folder image on it. (before, it was a tiny edge of the Scan Button)
There are more serious issues which it claims to have addressed. Colour handling and the like.