Help with MSI (Microsoft Installer) error 1635: This patch package could not be opened. Verify that the patch package exists and is accessible, or contact the application vendor to verify that this is a valid Windows Installer patch package.
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This behavior may occur when the following registry key is damaged:
HKEY_LOCAL_MACHINE\Software\Classes\Installer\Products\ DFAD2CEE8555CA04E8C905508C8F018E (read this for details).
Need to remove the software? First try Add/Remove Programs, then try the Windows Installer CleanUp Utiltiy
Also see:
Error Message: 1635 This Patch Package Could Not Be Opened
Answered 01/28/2004 by:
Red Belt

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I am just a simple housewife. I found the answer I needed right here.
Answered 01/07/2008 by: snappycappy
Yellow Belt

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Answer this question or Comment on this question for clarity