Moving your new work from one HD to the other should be real easy if you can see both in "my Computer!Can you ? I would call norton and see if they will help you remove the files that were in the last update, to see if that helps. If you can get it too boot into windows w/the new HD or the other one for that matter, you can do a restore to a date prior to update. Same Problem with two os installs may be hardware or drivers not OS. Not much help I know, is this your only PC? wish I could be more help