I am living in a house with concrete walls (no attic, no basement) and I want to run Cat5e or Cat6 Cable from the router which is downstairs to my office which is upstairs. Right now running cables through the walls is not an option.
previously I have been using these little nail things with a bracket on them to hold the cables down, but they tend to fall out, so that is not a useful option.
What is the best way to run ethernet cable so it stays in place and not spend too much money