Have 2 Dell 790 Windows 7 desktops that have been in production for over a month. Yesterday both clerks experienced BSOD within an hour of each other. Both were in an Access 2003 database running queries. Dell was contacted and a BIOS upgrade was performed but problem occurred again today accessing the same database. Am able to recreate BSOD on demand pretty much. Other applications run fine. Tried setting the Access2003 to XP compatability just to see if that might help but same result. They have worked for over a month. No recent MS updates have been run.