Something in your computer that you should delete if an IIS reset does not work.
Did you try an IIS reset? Well, if it does not work, try deleting your registry
Some part of your computer that does nothing but cause problem. Computer crashing? Probably has something to do with the registry. Unfortunately enough your average computer-user has no idea that the registry even exists.
Viruses, Spam, Ad-Ware, Hackers, and a screwed up Registry are all possibilities as to why your computer sucks ass.