A listener with an HP printer and laptop connected by a USB cable cannot get the printer to work properly. We recommend removing and reinstalling the printer drivers or possibly configuring the computer as a networked printer. A caller gets "critical" notifications from the anti-virus product running on his phone and is concerned about possible excess data usage on his cell phone. Also, he wonders if he needs to turn off the "data saver" feature of his cell phone when accessing a mobile hotspot. A caller with poweline internet networking is having difficulty getting his wireless signal extended. A caller with several older laptops wonders if he should try to upgrade to Windows 10. We also offer recommendations for a good Internet router. Target stores globally knocked offline for a few hours last week due to a network outage. Finally, we help a caller who has a "Firefox is already running but not responding" error message.