Adobe Flash 11.4.402.278 causes browser lockups & erroneous download requests

I've installed Adobe Flash Player 11.4.402.278 on multiple Windows 7 Pro computers.  After the install, various websites (i.e. MSN.com, Yahoo, YouTube) lock up when trying to open.  This problem occurs in both IE9 & Firefox.  The workaround in IE9 is to disable the Adobe Flash Shockwave add-on.  Secondarily, users repeatedly receive requests to download Flash even though it is already installed.  To make matters worse many video files will not play even after the user reloads Flash 11.4.402.278.  Does anyone know how to revert to an earlier version of Flash?  I didn't have these problems with the previous version (.265, I believe).

>Chris - I've installed 11.4.402.287 logged in as Domain Administrator on the HP laptop, then logged in as the regular user, and web browsing all ok now.  So it looks for now the issues I've been specifically experiencing have been resolved.  However, I think I will in future incorporate some acceptance testing before I start deploying future version of Flash everywhere!
> quarky422 - In the specific cases I reported I had the described problem and solution that worked for me, and the latest release has hopefully fixed that issue for good.  With the plethora of machine configurations out there I guess everyone has unique issues, but my approach is simple: if it worked before something was updated, start rolling back until you identify the cause.  It took me a few hours to identify the issue and I went down the wrong track initially (thought it was to do with a web site the customer visited then I also visited on a different computer and had the same problem, but when reports came in from other users I knew that couldn't be the cause).  I really thought it was down to a Java update, so uninstalled that and Flash and it worked.  On the next machine just removed Flash and it worked, so re-installed Flash while logged in as the user, and it still worked.  This link
http://forums.adobe.com/message/4323109 seems to be a fix though I have not tried it as the latest version fixed my particular problem, so may fix yours as well?  You don't say if you are logging in as Domain Admin or Local Admin.

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