Without proper system info and other technical details nobody can even begin to unriddle this. since it hangs on MediaCore it stands to reason that you have an incompatible Codec on your system or something like this...
@ Todd, I downloaded and installed the Adobe After Effects CS6 11.0.4 Update to no avail. I've also noticed that my Adobe Premiere doesn't open. I'll get the splash screen for just a moment, then it will simply crash. Acrobat, Dreamweaver, Illustrator, Photoshop . . . all of those programs are working great; it's just After Effects and Premiere that aren't.
I even downloaded After Effects from the Creative Cloud and it even refuses to open!
Here's my system specs:
Windows 7 Ultimate Service pack 1
Intel(R) Core i7-3770 CPU @ 3.40 Ghz
32 GB Ram
64 bit Operating System
I hate to sound like an idiot, but just how do I get an error log?
Thanks, guys for your patience and help.