I have tried working this via chat with no success. All the Windows Updates have been applied. I have run the McAfee removal tool (MCPR), the Mcpreinstall tool (MCPreInstall), tried creating a new Administrator account as suggested below, still no luck.
Edit : I only suggest this because you say that the steps to solve the installation problem in the other two threads did not work for you. One of the technical team might have some more pertinent suggestions.
Message was edited by: Hayton on 03/11/11 03:10:07 GMT