How Can I Remove http://●●●●.ga/server.pac hijacker Completely?

Viruses and worms
1

see the attachment
How Can I Remove http://●●●●.ga/server.pac hijacker Completely? whene i remove coming again

this issu cannot open google site & YouTube and avast see the are not any virus

http://imgur.com/a/ZRFYk

2

https://forum.avast.com/index.php?topic=53253.0