Hope this saves someone else the headache. This old dock is still useful for non-graphic-intensive office work or adding a secondary screen.
I just spent way too long trying to get my old Targus PA088E docking station working on a new Windows 10 64-bit laptop. If you are hunting for the driver, here’s the deal:
SOLVED: Targus PA088E Driver for Windows 10 64-bit (DisplayLink)
There is no "Targus PA088E Windows 10" driver. Targus stopped updating this model years ago. However , the hardware uses a DisplayLink DL-1x5 chipset, and the generic DisplayLink drivers work perfectly.