I apologize about all the problems you are having with the new update.  Future updates will  improve upon the operation of the device and address any problem issues.  If you have a taskmanager application on the device, try removing it or changing its settings.   This may help with the overall operation of the phone.  

From the home screen, touch the applications tab (located on the bottom of the screen).  

Touch Settings. 

Touch Applications.

Touch Manage Applications.

Touch the desired application. 

Touch Uninstall. 

Touch OK. 

Touch OK.