Microsoft release 2010 October Update for Windows 7.
Security Essentials has a big update.
Microsoft Security Essentials Version: 1.0.2498.0
Antimalware Client Version: 2.1.6805.0
Engine Version: 1.1.6201.0
Antivirus definitions: 1.91.1720.0
Antispyware definitions: 1.91.1720.0
After updating,reboot required.
