Exchange 2010 KB2756496 error 80070643

Update Rollup 7-v2 for Exchange Server 2010 Service Pack 1 (KB2756496)

Installation date: ‎12/‎21/‎2012 11:31 PM

Installation status: Failed

Error details: Code 80070643

Update type: Important

This update rollup resolves problems that were found in Exchange Server 2010 Service Pack 1 (SP1) since Exchange Server 2010 SP1 was released and replaces previously released update rollups for Exchange Server 2010 SP1.

More information: 
http://support.microsoft.com/?kbid=2756496
http://go.microsoft.com/fwlink/?LinkId=207096

Help and Support: 
http://technet.microsoft.com/en-US/exchange/dd203064

Fix:

http://www.expta.com/2012/08/exchange-2010-sp2-roll-up-4-does-not.html?showComment=1349847237817#c894835615165077581

Edited C:\Program Files\Microsoft\Exchange Server\V14\Scripts\ManageScheduledTask.ps1

and changed line 462 to write-output instead of return.