Hello Cle,In your Microsoft Genuine Advantage Diagnostic Tool (MGADT) report, you will notice that under the 'File Scan Data-' line there are a large number of files that are listed as 'Mismatched'. All those files are Critical Windows Vista System files. Normally, when there is one or two Mismatched files, it means that those files have been tampered or have become corrupted in some way. But in your case the MGADT report is indicating that ALL your Critical Windows Vista System files are Tampered or Corrupted.
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This is highly unlikely. What is more likely is that your System Catalog has been tampered or corrupted. The System Catalog stores all the Signatures Hashes (fingerprints) for all the Critical Windows Vista System files.
Im gonna copy/pasta a solution in a pinch:Due to limitations in the existing Windows Installer tools, you may need to edit the Windows Installer package (.msi) files directly. The Orca database editor is a table-editing tool available in the Windows Installer SDK and it can be used to edit your.msi files.In Order to remove UAC requirement(s), you can open a.msi file by Orca, click View-Summary Information, and check the “UAC Compliant”. Remember, the UAC is from Windows Vista /2008; there no UAC option exists in the old version orca editor. Just for your reference, the version of the Orca which I am using is 4.0.6001.0. You can download the latest Orca from the latest Windows SDK atLast but not the least, editing an MSI file can cause serious problems that may leave your system in an unstable state.
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Microsoft cannot guarantee that problems resulting from the incorrect use of the MSI file editor can be solved.