Try adding chrome extension like AdGuard and Disconnect.
And about backup, you can try windows in-built backup solution, then Macrium or Paragon both in their free versions to have a full system backup, and always have a cloud account to save just your important files and be sure to never lose them!
Did you think about replacing your RealTime AV when trial will expire?
Will you go on free or pay AV? There are lots of free and good solutions, just tell us your needs