Installing the KB2670838 update has some issue with WMP 12 on certain systems,that I already wrote in my earlier post here:WMP12 crashes after installing the update
Now here is the official response from Microsoft employee:-
Wuzzle(2) replied on
March 2, 2013
Microsoft
KB2670838: Microsoft is aware of an issue some customers are experiencing when installing KB2670838 on certain laptop systems with hybrid graphics. We are looking into the situation and are considering blocking the update for systems that could be affected. Customers who are experiencing issues on systems that already have installed the update should consider uninstalling KB2670838.
—————————————-
Not just integrated or hybrid graphics. I installed this on my Phenom II desktop with an ATI HD6770 running Catalyst 13.1. The immediate symptom was crashing Windows Media Player on opening ANY video file. Flash performance also seems to have suffered. Uninstalling this update fixed the issue for me.
By: Charles Nordlund on March 17, 2013
at 3:30 pm
Thanks Charles,it seems clear that this update has become a known issue with AMD HW.
Microsoft is working on it.
By: mymce on March 17, 2013
at 6:20 pm