My Windows 7 PC just picked up this update via Windows Updates. KB963660
“In prerelease versions of Windows 7, certain audio and video
codecs
expire after 90 days.
When you try to perform certain operations in this situation, such as DVD
playback, TV playback, and some device sync operations, the operation fails
with an error message such as “Decoder not found.” The affected codecs include
MPGG-2,
H.264, and AAC. Additionally,
Dolby Digital-related media may
not
play successfully.
In this situation,
you also receive the “Decoder not found” error message.
This
problem occurs because the trial period of the components expires on March
15, 2009. After you apply this update, certain audio and video codecs will not
expire on this date.”
UPDATE:
Is anyone else having problems installing this update? On my machine
it says failure configuring updates, then, reverting changes.
I have FFDShow Tryouts Beta 6 and Haali Media Splitter installed.


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i too have a problem installing this update
Looking on Google it seems quite a few people are having issues with this update!
I installed a fresh copy of Windows 7 build 7022 on a new HTPC today and KB963600 was not offered on Windows Updates and I could not manually install the update as it said was not applicable.
I am still unable to update my laptop however which is build 7000, I might just upgrade it to build 7022 now as it seems that build does not need this update.
There is a thread about this on TGB here:
http://thegreenbutton.com/forums/thread/338685.aspx