In general, Windows 7 RC is functioning smoothly on my Toshiba Satellite laptop. However, it returns a "Cannot Build Graph" error when I try to run Nero Showtime 7. Another blog suggested that a user uninstall, restart computer, and install Nero 7 with Administrator Privileges. But this did not solve the problem. I have encountered problems with Nero in the past (with XP Pro and Vista Business), which are usually resolved a few months following release. It might be nice to solve this one before the release.