Hi.
We use the msiexec /fvomus procedure as detailed in http://msdn.microsoft.com/en-us/library/aa367575(v=vs.85).aspx for updating our product. We recently started getting feedback from clients that our application wasn't updating properly. After investigating we've discovered that kb2918614 is to blame.
After this patch doing a msiexec /fvomus results in a UAC prompt which has to be clicked by the user. We do our updates using quiet mode however, and if the /q flag is used the install just fails silently.
