The sort of hang you're describing sounds like a full Temp folder issue - try the TFC from here... TFC - Temp File Cleaner by OldTimer - Geeks to Go Forums
The CBS.log has the following potential errors in today's data...
Code:
2013-09-27 07:28:48, Info CBS Read out cached package applicability for package: Package_for_KB2809215~31bf3856ad364e35~amd64~~6.1.1.1, ApplicableState: 112, CurrentState:0
2013-09-27 07:28:48, Info CBS Session: 30325570_1902687454 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:48, Info CBS Failed to internally open package. [HRESULT = 0x800f0805 - CBS_E_INVALID_PACKAGE]
2013-09-27 07:28:48, Info CBS Session: 30325570_1902843454 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:48, Info CBS Read out cached package applicability for package: Package_for_KB2809900~31bf3856ad364e35~amd64~~6.1.1.0, ApplicableState: 0, CurrentState:0
Code:
2013-09-27 07:28:52, Info CBS Read out cached package applicability for package: Package_for_KB2506212~31bf3856ad364e35~amd64~~6.1.1.2, ApplicableState: 112, CurrentState:112
2013-09-27 07:28:52, Info CBS Session: 30325570_1946991531 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:52, Info CBS Failed to internally open package. [HRESULT = 0x800f0805 - CBS_E_INVALID_PACKAGE]
2013-09-27 07:28:52, Info CBS Session: 30325570_1946991532 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:53, Info CBS Read out cached package applicability for package: Package_for_KB2574819~31bf3856ad364e35~amd64~~6.1.2.0, ApplicableState: 112, CurrentState:0
Code:
2013-09-27 07:28:54, Info CBS Read out cached package applicability for package: Package_for_KB2761465~31bf3856ad364e35~amd64~~10.2.1.0, ApplicableState: 0, CurrentState:0
2013-09-27 07:28:54, Info CBS Session: 30325570_1961811557 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:54, Info CBS Failed to internally open package. [HRESULT = 0x800f0805 - CBS_E_INVALID_PACKAGE]
2013-09-27 07:28:54, Info CBS Session: 30325570_1961811558 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:54, Info CBS Session: 30325570_1962747559 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:54, Info CBS Read out cached package applicability for package: Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514, ApplicableState: 80, CurrentState:0
Code:
2013-09-27 07:28:56, Info CBS Read out cached package applicability for package: Package_for_KB2836502~31bf3856ad364e35~amd64~~6.1.1.2, ApplicableState: 0, CurrentState:0
2013-09-27 07:28:56, Info CBS Session: 30325570_1984743598 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:56, Info CBS Failed to internally open package. [HRESULT = 0x800f0805 - CBS_E_INVALID_PACKAGE]
2013-09-27 07:28:56, Info CBS Session: 30325570_1984743599 initialized by client WindowsUpdateAgent.
2013-09-27 07:28:56, Info CBS Read out cached package applicability for package: Package_for_KB2799926~31bf3856ad364e35~amd64~~6.1.1.0, ApplicableState: 112, CurrentState:112
This list appears to me to be a lot smaller than previous ones - but may not be complete because of the way the system works.
There are certainly no major problems in the log