After Win 8.1 upgrade, NCB, NLS, BITS fail to start, other corruption?

Question

Recent Win 8.0 pro just upgraded to 8.1 through store.  After upgrade, a number of things don't work, suggesting corruption.
Event 7023 
The Network Connection Broker service terminated with the following error: 
Network Connection Broker is not a valid Win32 application.
Event 7023 
The Network List Service service terminated with the following error: 
Network List Service is not a valid Win32 application.
Chrome to google won't accept the certificate, suggesting root certificate file corruption.
trying to manually run windows update, three updates are selected, but trying to download them hangs. 
Event 16392
The BITS service failed to start.  Error 0x80040154.
How do I re-run upgrade or otherwise recover?
thx
-dB

Answer 1

Finally getting back to this.  SFC is unable to correct several hundred files with errors such as
2013-11-29 14:18:57, Info                  CSI    0000009a Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-computer-name-ui_31bf3856ad364e35_6.3.9600.16384_none_fec58799c27a34d6\netid.dll
do not match actual file [l:18{9}]"netid.dll" :
2013-11-29 14:18:57, Info                  CSI    0000009b [SR] Cannot repair member file [l:18{9}]"netid.dll" of Microsoft-Windows-Computer-Name-UI, Version = 6.3.9600.16384, pA = PROCESSOR_ARCHITECTURE_AMD64
(9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
2013-11-29 14:19:02, Info                  CSI    000000ae Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-computer-name-ui_31bf3856ad364e35_6.3.9600.16384_none_fec58799c27a34d6\netid.dll
do not match actual file [l:18{9}]"netid.dll" :
Among the major problems is being unable to get updates, because BITS won't start:
The server {4991D34B-80A1-4291-83B6-3328366B9097} did not register with DCOM within the required timeout.
The Background Intelligent Transfer Service service terminated with the following service-specific error: 
Class not registered
The BITS service failed to start.  Error 0x80040154.
I'd really like to do a refresh of 8.1, or re-run the update from 8.0.   How to do either?
thx
-dB