All of a sudden I can't drag anything anywhere in After Effects. I can't move any media into the composition I am currently working on, and I cant rearrange anything in the composition. It was all working fine a minute ago. Everything else works but I suddenly can't move anything. Using a PC, Yes I am using the selection tool, I have restarted the program, I have restarted my computer.
Nobody can tell you anything without proper system info or other technical details. Just saying that it doesn't work is not good enough. We know nothing about your computer, your version of AE, your comps, your footage and so on.