HI! my After effects is getting a bit annoying, I open one of my projects I have been working on and I do on e thing, like editing opacity, scale etc and the program doesn't respond, My preview is on third, and looking at my pc specs I can run this program without a bother, I hope you can get back to me!
We can't know anything. You are running off with vague descriptions without providing any details about your system, your version of AE, your comps, effects used, footage and a gigazillion other things.
As Mylenium says, we need to know a lot more if we're going to help you. Please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"