Windows Update fails with error 66A

On attempting to install updates the client was failing with the error code 66A, this is due to corrupted install files when attempting to update the Microsoft .NET Framework 4 Client Profile. In order to resolve this and install updates successfully perform the following:

1) Browse to Start > Control Panel > Programs > Uninstall a program.

2) Select ‘Microsoft .Net Client 4 Profile’ and Uninstall.

3) Choose to ‘Repair .NET Framework 4 Client Profile’ to its original state.

4) Once the repair is complete perform a restart.

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