When I try to, it says "Unknown Exception Occurred". Then a dialog box pops up that says "After Effects Error: Crash in progress. Last logged message was: <2916> <DynamicLink> <5> C:\Program Files\Adobe\Adobe After Effects CC 2015\Support Files\32\dynamiclinkmanager.exe. It also gave me this code ( 0 :: 42 ).
I'm working on Windows 7, 16 GB RAM, i7 processor, GeForce GTX 760 video card.
Installed last night, so fully updated.
It's a problem with your anti virus. If you have Malwarebytes installed, he recognizes some AE archives as threats and then blocks them, for example. You just need to disable your anti-virus and firewall and you're good to go