Depending on your HijackThis Log:
Your Hosts File has something not right, So:
Download and install
HostsMan.
after install run it, click on "update Hosts", choose "MVPS Hosts" and in below options choose "Overwrite Current" hosts.
this step would immunize your
Hosts File and would prevent any internet traffic to malware sites and also would fix Windows Hosts File if it has been HiJacked by malwares.
Yet, some parts of AVG is running in your computer:
Download and run
AVG Remover 32Bit or
AVG Remover 64Bit.
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Some additional options to make sure your computer is running healthy:
Download, install and update these programs (just use Offline update installer if you cannot use Live Update to update your programs):
scan your computer using them and let them remove everything they found.
also, to try another antivirus engine, you can try:
The Avira AntiVir Rescue System a linux-based application that allows accessing computers that cannot be booted anymore. Thus it is possible to repair a damaged system, to rescue data or to scan the system for virus infections. Just double-click on the rescue system package to burn it to a CD/DVD. You can then use this CD/DVD to boot your computer. The Avira AntiVir Rescue System is updated several times a day so that the most recent security updates are always available. You can download it from
Here. You can learn how to use it from
Here.
also, if you want to burn that disc yourself with your own burning tool (Such as Nero or…), you can download the Image File (.iso) from
Here.
After burn it to disc, use it to boot your computer and do a full scan and remove everything it find.