Hi Verylost,
I'm sorry you're having trouble with the format of the picture- like you said, don't give up! Now, I don't recommend removing the last 3 weeks of updates, because you'd lose a lot of critical updates in the process which would leave you vulnerable to threats- which believe it or not are worse than Bing! I don't believe that it would remove Bing either, unfortunately. Let's try to move past the screen shots for now, just for the sake of making some progress for you.
If I understand you correctly, you're using Internet Explorer 11, and are experiencing symptoms of Bing when Right-clicking (as in, when the menu for right clicking appears, Bing is somewhere in that list). And further, you believe there may be Add-ons of Bing loaded into Internet Explorer and that Yahoo! is no longer your default search engine. Is this all correct? If not, can you correct me on each point that isn't quite right?