Microsoft: Setup Wizard for Exchange Update Rollup Ended Prematurely

The installer fails with the following error messages:
"Setup Wizard for Update Rollup 5 for Exchange Server 2010 Service Pack 3 (KB3184728) ended prematurely because of an error. Your system has not been modified. To install this program at a later time, please run the installation again."

<< Cause >>
The reason for the error and why the Update Rollup installer is “ended prematurely” is because the server has User Access Control (UAC) activated on the server. For good reason, it is not recommended to disable the UAC.

<< Solution >>
The recommended process for installing Update Rollups on the server, is using an elevated command prompt (Open a CMD with Run As Administrator) and make sure the Update Rollup is located on a local drive of the server and start the installer using:
SYNTAX example: msiexec /update <UPDATE .MSP FILE>

How to Start Setup Wizard:
msiexec /update Exchange2010-KB2917508-x64-en.msp

How to install the Update Rollup unattended (silent) add the following parameter (/quiet):
msiexec /update Exchange2010-KB2917508-x64-en.msp /quiet

Documentation: Unable to Push SCOM Agent in Windows Server 2012

To solve this issue, you have to make sure that Microsoft .NET Framework 3.5 is installed or enabled.

To install or enable Microsoft .NET Framework 3.5 in Windows Server 2012, please follow the steps below:

1. Insert or mount the Windows installation disc into the server
2. In Server Manager, click Manage and then select Add Roles and Features to start the Add Roles and Features Wizard.
3. On the Select installation type screen, select Role-based or feature-based installation.
4. Select the target server.
5. On the Select features screen, check the box next to .Net Framework 3.5 Features.
6. On the Confirm installation selections screen, a warning will be displayed asking Do you need to specify an alternate source path?.

7. Click the Specify an alternate source path link to specify the path to the D:\Sources\SxS folder on the installation media in Step 1 and then click OK.

8. After you have specified the alternate source, or if the target computer has access to Windows Update, click the X next to the warning, and then click Install.
9. You should now see this under your Features list: