After a two year dry spell using Sony Vegas rather than After Effects, I've decided it was once again time to reopen the old program and got a free trial to use. I was very confident that I would enjoy it as much as I had years ago, and only wanted the trial to make sure I was SURE before buying it. Well, after six hours of absolute Hell, I'm not so sure anymore.
First, it took four tries for me to open the program. Each time I would try to open it, it would simply not open even after a solid twenty minutes of waiting. Then, once I finally got it to launch, it then proceeded to crash SEVEN times before it would open up to the actual program at all. Finally, getting it open, I realize that every single time I click anything the program is buggy, laggy, and all around a chore to use. I managed to add one effect to a clip before the entire thing crashed and caused my computer to be practically unusable for a solid thirty minutes. Everything I touched crashed, my windows crashed. EVERYTHING, and this is the same computer I used the program on before.
I will have a very hard time believing this is a problem with my computer. I can use Vegas Pro 14.0 with every plug in perfectly, Photoshop, Dreamweaver, and Premiere Pro work perfectly. After Effects worked like a dream until I deleted it for lack of use and needing more space two years ago. Now, every time I touch it it wrecks my computer.
Nobody can tell you anything without exact system info or other technical details. You'v written a lot, but said very little. Running off with verbose descriptions of your crashes is of no use to anyone when you don't back it up with technical information.
Are you still facing this problem? If not, let us know how you solved it. If so, please let us know so we can assist you further.