Hmmm...
I login once per day. Provided I don't close the browser I stay logged in even if I don't touch the site for several hours. It does rememeber the login though, all I have to do is click the Login link once and I'm in.
Cookies - IIRC. You need to allow area
.autodesk.com and accounts.autodesk.com - and not have them automatically deleted when the browser closes. Don't ask me how to do that in IE - I never touch the &^%$ thing.
You do realise that Norton is the biggest resource hog since, well, Windows itself? Unless you're up against an IT dept, get rid of it - causes more problems than it (allegedly) solves.
Max 2016 (SP1/EXT1)
Win7Pro x64 (SP1). i5-3570K @ 4.4GHz, 8Gb Ram, DX11.
nVidia GTX760 (2GB) (Driver 430.86).