One of the biggest problems I come across, is when someone can't get their PC connected to their wireless home network. Yet, it seems to connect everywhere else but in their house.
Before I get the chance to look at it, I hear a long laundry list of things that were attempted to get the wireless connection working. Like re-typing the encryption password a thousand times, "rebooting the router first then my PC" (and a dozen other different ways), even moving the PC closer to the router.
Nothing works 🙁
But there are always two things missing in that list, if checked, may have saved hours of frustration and allowed more hours of surfing the web.