I keep on getting this "The activation of AAC (MC) failed. If you are using the program as a guest, please repeat the activation procedure with administrator rights." it only happens when I try to drop or import any video type into vegas pro 18. but for some reason, MKV is able to be dropped since I enabled it in the file I/O.
So...have you done what the error window suggests?
I did but nothing worked at all. I also contacted support for help they show me a lot of things to do to try and fix it but no help at all. from what I learned so far from another person who has had the same problem is that if you freshly installed Windows the software should work then. but then the problem happens again.