I've got a system running 24/7 with 4 PCs and 4 .NET rack mount intros. 2 PCs are running XP and 2 are running Windows 7. The XP systems have been running for days without a problem, but the 2 W7 machines drop the .NET boxes after several hours. The drops are temporary, because they pop right back up after relaunching Showtime. Still need to go through and make sure there are no problematic settings in the W7 machines. But I thought I would check to see if there are any known issues with running .NET and Windows 7 for extended periods of time. Anyone have any similar experiences, or solutions?