Microsoft - Important security updates to be released on April 12
Microsoft has released advanced warning about the bulletins it will be releasing next Tuesday.
http://www.microsoft.com/technet/security/bulletin/advance.mspx
* 5 Security Bulletins for Windows, maximum level Critical
* 1 Security Bulletin for Office, level Critical
* 1 Security Bulletin for MSN Messenger, level Critical
* 1 Security Bulletin for Exchange, level Critical