If you are using Microsoft Windows NT4.0, NT4.0 Terminal Server Edition, Windows 2000 and Windows XP, better install this new bug patch. It prevents hackers from gaining complete control over your PC! The second patch only affects Windows XP and Windows 2000. It corrects a security bug that changes a network's security policies. You can get more information here. The final patch (for today!) is for the Microsoft Virtual Machine. Apparently, there are several security bugs that could allow malicious people access to your system and maybe... format your hard disk? Hehe... Check out the information here.