Microsoft would be releasing 3 critical and 1 Moderate patches on May 13, 2008.The 3 critical patches would be for Microsoft office and Windows and the Moderate one would apply to Windows Live OneCare, Microsoft Antigen, Microsoft Windows Defender, Microsoft Forefront Security.Here are some more info from Microsoft :

• Critical Patches (3):

Bulletin Identifier Word Bulletin

Severity Rating : Critical

Impact of Vulnerability : Remote Code Execution

Detection : Microsoft Baseline Security Analyzer can detect whether your computer system requires this

Microsoft last week re-released a software update intended to provide performance and reliability enhancements for Windows Vista -based and Windows Vista Service Pack 1-based systems. It was one of eight security bulletins and updates the company made available on April 8.

Users who installed the update, however, soon found their USB devices unresponsive, particularly mice and flash drives. Removing and re-installing the programs reportedly did not immediately solve the problem.

Microsoft confirmed the bug, but declined to provide further details.

"We are aware of concerns that a recent Microsoft update may be causing problems with USB devices," according to a Microsoft spokeswoman. "We are investigating the matter and at this time do not have any additional information to share."

"I have a new system that has been working flawlessly til this patch," a user known as SkyKnites wrote on a Google forum last week. His mouse was later restored, but now "I just get this annoying new hardware found and driver install has failed [notice] every time I reboot," he wrote.

A user known as JB also encountered problems. "I have exactly the same problem as described here,