I have been experiencing some crashes with VS210. I'm sorry to say that the add-ins that I have installed are so well integrated into the UI that I'm not quite sure what is add-in and what is VS!
Is it simply a case of checking Tools->Add-In Manager & Tools->Extension Mamager? (I am assuming that Tools->External Tools cannot uimpact negatively on VS?)
Is there an easy way to purge everything back to a vanilla state in VS2010?