Yes, I agree it's something in Windows, but at the moment there's nothing to point us into the right direction, but I was asking about the clean install merely to consider our options. This issue is a bit different from your previous one.
Please do the following:
Step#1 - Capture Process Monitor Trace
1. Download and run
Process Monitor. Leave this running while you perform the next steps.
2.
Attempt to install the update just like you have in the past.
3.
Stop Process Monitor
as soon as the update fails. You can simply do this by clicking the
magnifying glass on the toolbar as shown below.
4. Select the
File menu...
Save... and save the file to your
desktop. This is likely the default location. The name (unless changed) will be
LogFile.PML. This is fine.
5. Zip up and attach the
LogFile.PML file as well as your
CBS.log.