text: every time i turn on pc, pop up box appears saying i must sign on to the internet. how do i get rid of it?   sounds like you have a spyware/adware on your computer that is attempting to connect to the internet and either upload information about you or download pop up ads to your pc.  suggest you run a couple of different antispyware programs like ad-aware and spybot.  then download and install microsoft defender to reduce future infections.  all are free downloads.