Microsoft provides a number of security-related resources.
OhMyGov.com is a critically acclaimed political blog which monitors the rapid rise of social media in government, sponsored by Microsoft Government. It addresses critical gaps facing government agencies and politicians as they race to incorporate Facebook, Twitter and other social media into their operations.
M I C R O S O F T I R E S O U R C E S
Windows security - Microsoft:
http://www.microsoft.com/protect/default.mspx
(patches)
http://update.microsoft.com/microsoftupdate/v6/default.aspx?ln=en-us
Security resources for home computer users
http://www.microsoft.com/security/default.mspx
A variety of resources including virtual labs and training materials
http://www.microsoft.com/technet/security/understanding/default.mspx
A round-up of worldwide Microsoft security sites
http://www.microsoft.com/security/worldwide.mspx
The Trustworthy Computing Initiative security overview
http://www.microsoft.com/mscorp/twc/security/overview.mspx
Microsoft security bulletin search
http://www.microsoft.com/technet/security/current.aspx
The Microsoft TechNet blog