I installed SP1 on Windows 7 Ultimate a few weeks ago and no problems until I updated a video driver. I couldn’t get it resolved so I restored the image I made just before installing SP1. Every thing seemed to work so reinstalled SP1. I tried using Good Sync and got a read only error. Apparently installing SP1 disrupted the sharing/security settings. I fumbled through those and now the drives all work OK. Just a little headsup on SP1. I think 2 of the worst features on Windows 7 are the networking and sharing settings, They aren’t the most user friendly!