Can't Confirm - See if there are any common versions below so we can potentially rule them out
OS: Windows 7
WLM: 14.0.8089.726
MP!L: 4.83.0.376 (24/12/2009)
Microsoft Security Essentials:
Microsoft Security Essentials Version: 1.0.1961.0
Antimalware Client Version: 2.1.6519.0
Engine Version: 1.1.5502.0
Antivirus definitions: 1.77.970.0
Antispyware definitions: 1.77.970.0
http://google.com - works
http://www.google.com - works
www.google.com - works
https://google.com - works
https://www.google.com - works
google.com - doesn't (intentionally)