My RPC error messages occured on 4 separate PC’s running 4 separate Windows versions. All out of the blue with no other software activity going on. In fact one PC I left running while I was gone for a week. Fine when I left but when I returned it had what I’m now calling the ‘red dot of death’. No one (users or Avast staff) have a solution. On this thread…for someone to suggest reinstalling Windows is ridiculous.