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.NET updates fail to install with error 800B0100 and 80070308
KB 2518869, KB2572077, KB2633873, KB2656356 repeatedly fail to install with errors 800B0100 and 80070308.
These four security patches have repeatedly failed to install since 23 March.
Win 7 SP1 was installed on 21 March 2012
I have run the Microsoft FixIt and the System Update Readiness Tool (KB947821) but no change.
Looking for any guidance on how to install these four updates.
Some background info...
Running Win7 Prof 64 bit SP1
The PC is 2+ years old (probably mid 2010)
Win7 was installed from scratch on the PC as new
IE9 was installed on 9 Feb 2012
Chrome and Firefox are both installed
MSE is installed
No other security/anti-virus tools have ever been installed
No registry cleaners have ever been used.