Microsoft issued eight security bulletins yesterday as part of its monthly security bulletin release schedule. Five of the bulletins address flaws that are rated critical, the software giant's most dangerous designation.
  
Critical security patches are now available for various versions of Windows, Microsoft Internet Explorer (IE), Microsoft Exchange Server, Microsoft Office Word, and MSN Messenger. Critical flaws can typically lead to a remote user exploiting the flaw and taking control of a user's system. The three other security bulletins are rated important, the second most dangerous designation.
  
Users who are interested in downloading the patches for these flaws should enable Automatic Updates or visit Windows Update. For more information about the flaws, visit the Microsoft Security Web site. On a related note, the company enhanced the Microsoft Security Bulletin Advance Notification service this week to include information about regular updates to the Microsoft Malicious Software Removal Tool.