For all who have Windows Installer/WMI/Norton Issues

Here is your solution:

Go into "My Computer"
Access properties of the local disk (C
Click on the security tab
Click on advanced
Check the box for Replace permission entries on all child objects with
entries shown here that apply to child objects
Click apply

Any program that was failing to install can now be installed.

Check WMI to verify it works:
Right click My Computer in the Start menu and click on Manage
Expand Services and Applications
Click on WMI Control
Right click WMI Control and select properties
You should have Successfully Connected to <local computer>

Run LiveUpdate for Norton

Run Windows Updates

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Horsepower