nVidia binary driver 361.42 not installing in LL3.0

[m654321]

What is your video card? Your signature in (1) does not show it.

Thanks for your reply Jerry - you actually partially solved my problem elsewhere on the forum, where you indicated that I needed Nvidia Optimus (via command line), as opposed to using the 'Install Drivers' GUI, as I had a Geforce 870M video card, and so I used the command line under Optimus in the graphics drivers section of the LL Help Manual.  All working now so I'll mark this post as solved.

However the Help Manual needs to clarify the following when installing or deciding to install NVidia Optimus:
(1) How do I know if I need Nvidia Optimus on my computer? (If you hadn't told me, I wouldn't have known the answer - where does one go to find out?)
(2) Make clear that immediately following a fresh install of LL, update the kernel, then do the Nvidia Optimus install, but do this BEFORE installing anything else (e.g. run 'Install Updates' after Nvidia Optimus) 

Many thanks for your help & interest - much appreciated
Mike