You may see your IIS 6.0 applications failing to respond after you install Microsoft update KB 982666

We are recently seeing lot many support cases coming our way. If you are seeing the following after installing the Microsoft update KB 982666 on a Windows Server 2003 machine:

• IIS application pools or websites no longer starts.
• IIS web-sites may not be able to start.
• Rapid Fail Protection shuts down your application pools.
• An inspection of the event logs show that the IIS worker processes are terminating unexpectedly, showing event messages similar to the following:

Event Type: Warning
Event Source: W3SVC
Event Category: None
Event ID: 1009
Date:  12/9/2009
Time:  10:55:01 AM
User:  N/A
Computer: WEBSERVER01
Description:
A process serving application pool 'DefaultAppPool' terminated unexpectedly. The process id was '1234'.
The process exit code was '0xffffffff'.

Please go ahead and reapply Windows Server 2003 Service Pack 2 to resolve this issue.

For more details visit the following link.