What exactly is happening that convinces you that you have a Virus?
I would encourage you to visit and download Malwarebytes. (the free version) If you can download and install it, this program will help in a big way. If you cannot download and run Malwarebytes, then try Chameleon.
Try uninstalling your browser and reinstall it again.
I think some virus has ifected your "hosts" file so you cant run those websites. Restart your PC press F8 before Windows boots and select "Safe Mode". Login to your user account go to C:\Windows\system32\drivers\etc" and open "hosts" file in Notepad there would be some websites at the bottom of the document. Delete every but "localhost", now save it and Restart your PC.