This Thread belong to [this](https://stackoverflow.com/questions/5716078/wpf-performance-issue-due-to-ui-automation)

I am asking where do I need to insert the workaround from [this](http://social.msdn.microsoft.com/Forums/en-IE/windowsaccessibilityandautomation/thread/6c4465e2-207c-4277-a67f-e0f55eff0110)

I have a WPF application which has performance issue on some clients with Windows 7. On Windows XP all is working fast. The application has a MainShell and some Child-Windows. The MainShell hangs sometimes on some machines, and so do the child windows. Now, do I have to insert the workaround from the thread from the above link in all windows?
Are there still other workaround about this?