Hi lutyman and Welcome.
is known to be a cause of BSOD's on Windows 7 systems. On that basis I would suggest that you uninstall Norton using the Norton Removal Tool ftp://ftp.symantec.com/public/englis...moval_Tool.exe
in Safe Mode. Download Blue Screen friendly Microsoft Security Essentials
as its replacement. Make sure Windows firewall is enabled!
See how it goes tomorrow when you start up.