try flush dns
Press Win+X to open the WinX Menu.
Right-click on Command Prompt and select Run as Administrator.
Type the following command and press Enter: ipconfig /flushdns.
If the command was successful, you will see the following message: Windows IP configuration successfully flushed the DNS Resolver Cache.
works for windows 7 the same just use cmd for the command prompt & run insead of win+x to find it
try reset your profile
also avast 2014 or ccleaner can reset browser profile to default.