My Internet keeps going off every second after i scan it. What is wrong?

[Reva]

I use the Internet and i also have Hotspot Shield. Sometimes it will go off every second even I reconnect it and also the white bars at the bottom of my computer and i try reconnecting the adapter too when it goes out. sometimes i'll go through Internet Connections scanner and Network Adapter scanner. When I do that, it will work fine and the scanners will say there is no problem. After I done scanned it, it will go back off again. It goes off every second. How do I fix stubborn Internet connection problems. It is very annoying. Also how do i fix hot spot sheild? is there a better wireless adapter out there?