This issue was seen after the some windows updates for some system. There are few troubleshooting steps that you can try to solve it.
- Open Windows Live Mail - On the left of the home button click on the arrow pointing down, and then click on Options, Click Mail.... - On the tabs on the top click the tab called Read. - Now you will see 4 check boxes. Make sure the Box for Read All Messages is checked.
Secondly, corrupt windows registry causes freezing in computer. The third most important thing that you can do to optimize your Facebook is to optimize your internet connection. So it is recommended you use a system utilities software that provides the feature of internet optimizer. Also remove unwanted add-ons/extensions from your browser. It is also recommended to clean system junk and browsers junk. The above guidelines allow you to Avoid Facebook Freezing and keep your Windows properly maintained.