Hi,
I have found a temporary fix for the issue people have with the peoples internet not working and just displaying blank pages. After trying different methods i have managed to work out that it is the BitDefender AntiVirus that is causing your internet to stop working and just showing blank pages. Now what you need to do is turn your anti virus OFF. BUT do not open BitDefender and then go into Advanced and then AntiVirus and turn it off from there as you will still get your blank page problem. What you need to do is explained below:
1) Open BitDefender 2010
2) Go in Advance Mode
3) At The Top Right There Will Be A Button Called Settings, Click It
4) Make sure its in Expert Mode
5) Disable ALL the Security Settings (Not The General Settings)
6) Now Try Your Internet, It Should Start Working
7) Enable All The Ones You Disabled EXCEPT For The AntiVirus (default: Vulnerability Check, Antiphishing, IM Encryption, Firewall, Automatic Update, Antispam, Identity Control, File Encryption)

Yes your antivirus is turned off but its the only way it will work without having to keep restarting your pc. Just make sure you dont download any dodgy files or go on any dodgy sites and you will be fine.
Enjoy surfing again 