while getting tech help from microsoft to try and get my presenter mouse to work in power point, they started downloading vista service pack 1. I have been using Visa Business for abou 6 months with no problems. They did this because a newer Vista driver for my mouse had neveR been installed and it would not insall so they upgraded the service pack. But it crashed. and when I finally got it running, the right half of my keyboard produces the wrong symbols. If I hold down The blue fn key most of he letters are correct. It is driving me crazy just typing THis. help! I've run a registry cleaner, rebooted, etc. any thoughts?