Error installing Exchange 2010 SP2 Rollup 5v2

I managed with this error in Windows 2008 R2 and Exchange 2010 SP2...

When you try to install this update you can find one or all the following errors in the EventLog or in the Windows Installer Log:

 Microsoft Exchange Server - Update 'Update Rollup 5-v2 for Exchange Server 2010 Service Pack 2 (KB2785908) 14.2.328.10' could not be installed. Error code 1603. Windows Installer can create logs to help troubleshoot issues with installing software packages

DEBUG: Error 2826: Control BottomLine on dialog FatalError extends beyond the boundaries of the dialog to the right by 5 pixels The installer encountered an unexpected error while installing this package. This may indicate a problem with this package. The error code is 2826. The arguments are: FatalError, BottomLine, to the right

msgErrorExchangeAdmin = The user who's currently logged on doesn't have sufficient permissions to install this package. You need at least Exchange Server Administrator permissions on the current computer to complete this task.

Basically we have two different problems:

1. We have a compatibility problem with one update
• The incompatible update is: Windows Management Framework 3.0 , in my case, at the end of the name, appears "(beta)".
• You should uninstall it and reboot the system, then continue with step 2.
2. We need to run the installer with admin privileges
• Run the update from a Command Line window executed as Administrator

That's all for me!

If you are installing this Rollup update because you need to solve problems related with Retention Tags, Calendar and Tasks I recommend to visit THIS blog.