IS IT POSSIBLE TO INSTALL AVAST AV AND AVAST IS BOTH? because when I finished installing my avast AV then when I tried to install my AVAST I.S when I double click the installer a window pops out but the problem is, it’s still the AV set up that has two options either uninstall or repair. weird!!!
This was not easy to understand… ???
well…You have avast free installed and want to install avast AIS (internet security) is that it ?
YES!! GOT MY POINT! 
You should uninstall the free one before installign the paid one