Dell Vostro 1000 - Win10 64-bit Touchpad driver?

Upgraded a rusty-but-trusty Vostro 1000 to Windows 10 64-bit.  Found that an old Radeon driver for Vista 64-bit seems to work fine...and everything else was recognized by Win10 and works great.

The touchpad though is being a pain in the ***.  The default Win10 driver doesn't recognize the scroll regions on the touchpad...I tried a Synaptics driver, that seemed like it worked for a while, then the cursor got real "sticky" on the screen, to the point where it was unusable.

Found a Dell driver for related models with a Vista 64-bit version...installed and seems fine, but again has no options for enabling the scrolling.  I think the device is actually an Alps touchpad...

Anyone have any idea of a good driver for this thing that would enable scrolling?