Some computers you need to be an administrator before you can perform any heightened actions such as running a command shell like the toolkit to work properly, I do all my phone flashing and stuff in the admin user because I ran into a problem once while in the normal user mode.Yes, multiple times.
PDAnet lets you tether from your phone to PC, but what it does first is it automatically downloads drivers for you once you select your phone model, your case Galaxy Nexus. The setup wizard will install the proper driver for you and it should work.PDAnet? Can you elaborate? First time I've heard of it.