Made the mistake of installing vista service pack 1 on perfectly functioning computer. It started crashing programs etc. In the past when I had problems with new installs I simply restored to earlier version using Acronis disk image. But this time had all sorts of problems but finally got it restored, Acronis said it was successful, and it stared up normally but instead of deasktop appearing the "preparing desktop" came up like it was a first time start up and then the screen goes to blank light blue. Machine is not crashed, and task manager works and it appears everything is loaded and running. I have repeated this several times with same result. Is there anyone that can help - It will take a zillion hours to reload the programs and start from scratch.