Internet Explorer safe mode
Sometimes an Internet Explorer add-on will cause the entire thing to mess up and refuse to open.
You can see if this is the problem with your IE by going to the START menu and clicking RUN. Type “iexplore -extoff” and then click OK. If IE opens up, then it’s probably an add-on problem preventing you from opening it normally and you will need to disable the offending add-on. Goto Tools–>Manage Add-ons and scroll through them. The Microsoft ones are usually ok. Look for anything that is marked corrupt or doesn’t have publisher information and disable it. Close IE completely and try to open it normally. Repeat this process, disabling add-ons until you hit on the one that is giving you trouble. If you think you still need that add-on then goto the publisher’s website and look for an updated version. Good luck!