Are you sticking with your older version of Windows instead of upgrading to Windows 7?
After a while, only computers running the latest service pack will still get updates to keep them safe.
When support ends, you will not receive any new security updates for Windows.
Windows 7 users, you dont need to worry; no service has been released for it yet.
Stay tuned, and well let you know when any new service packs are available.
www.microsoft.com/EOS End of Support Information from Microsoft
