My OS is win 7 prof 64 bit, and I use Offic e 2007. Whenever outlook starts, it seems to freeze, and I am unable to click on any where or the buttons, and finally I have to load the taskmanager and end the program. I tried starting outlook in the safe mode, pressing the control key down and loading outlook. Still the same problem. This happened after I had installed Thunderbird trying to use it as a standby application. Can the Experts please suggest a sequence of steps to fix this problem. I will uninstall Thunderbird to start with.