An antivirus, would not prevent your software finding licences, and according to your earlier posts, both FP and RC appear to be working perfectly well. However an antivirus, could prevent certain pieces of code from running, which might have been installed for whatever reason, but which are not actually part of FP or RC
Another thing that could prevent legitimate software from running, would be a firewall. By blocking a program from connecting to the internet and in that case you would have to go into the firewall and allow said program to connect.