I have been unable to come up with a rhyme or reason to this problem.
For some reason the Windows 8.1 start button will no longer respond to a right-click. The context menu will not come up. You can see that the active window is no longer active because the border color changes. The start button works as expected when left-clicking it.
I first noticed this on a brand new Windows 8 machine that I upgraded to Windows 8.1. The problem occurred while I was messing with trying to customize the default user profile. The next time I logged in with a new user account the start button was broke. The system I was using was stripped down. It had NO additional software on it except the drivers and necessary associated applications, and all available Windows updates were installed. I chaulked it up to something I messed up.
Next, I reformatted 20 lab computers with Windows 8.1 Pro and joined them to a Server 2003 domain. Users have roaming profiles and folder redirection policies. The folder redirection policies redirect AppData, Documents, and Desktop to a folder on the server and the contents of these folders are shared between Windows XP and Windows 8.1. The roaming profiles are unique and new. Thus far all users have only logged on to Windows XP so they have the version 1 profile and when they logon to the Windows 8.1 box a new .v2 profile folder is created.
Today, we logged about 12 users into these individual machines for the first time and about 3 or 4 of them could not right-click their start button. Once the problem occurs, it never goes away regardless of what machine they log into. The only way to solve the problem is to default the profile off the computer and delete the roaming profile folder off the server. The problem has reoccurred after this but I'm not sure what triggers it.
In addition, I have tried renaming the user's redirected application data folder and letting Windows 8.1 create a new one in case there was a conflict with a Windows XP setting. This did not resolve the issue.