Open Internet Explorer go to TOOLS < Manage ADDONS and check for anything unusual.
Post your C
Windows\System32\Drivers\etc\hosts file
Any particular reason you using those DNS numbers? 68.105.28.12 68.105.29.12 68.105.28.11
Go to local area connection properties, TCP/IP properties set to obtain DNS automatically.
open CMD and do
ipconfig /release
ipconfig /renew
ipconfig /flushdns