I just recently downloaded an Internet Explorer 7 update. And now my computer is displaying several error messages when I try to access the internet. Also, my arrow is showing up as a black square. I can still use it, but I think this is a problem with my computer. I remember last time I had a problem with my computer, one of the directions geeks to go gave me was to go back and start my computer from selected time (like before I downloaded the update). Is there something like that I can do to fix my computer?