Exchange 2010 RPC Client Access service won't start

Exchange 2010 RPC Client Access service won't start after installing SP3 + Update Rollup 10.

Host is SBS Server 2011.

Have tried multiple fixes on the web but without luck:

• Setting the Microsoft Exchange Information Store service to Automatic(Delayed Start)
• Setting HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ MSExchangeRpc\ParametersSystem with a port number
• Re-creating the Microsoft.Exchange.RpcClientAccess.Service.exe.config file.

Event logs:

Event 2280, IIS-W3SVC-WP The Module DLL C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\auth\exppw.dll failed to load. The data is the error.

Event 5139, WAS A listener channel for protocol 'http' in worker process '6700' serving application pool 'WsusPool' reported a listener channel failure. The data field contains the error number.