Just remove AVG, all it does is hog your resources and doesn't give that much protection to begin with. Error 201 is a connectivity error, or using an outdated launcher version. Since you're having problems with other programs, it's most definitely a connectivity error.
Just remove AVG to start with. Then put in exceptions in the Windows Firewall for eso.exe and all files associated with The elder scrolls online. Should give the program access to the internet again.