HOW TO
If a computer has an installed software product that uses the .msp extension, such as Paint Shop Pro, a patch file may not be recognized as a Microsoft Windows Installer Patch file and double-clicking on it will not start the install process.
Instructions provided describe how to call msiexec.exe directly, using the appropriate command line arguments and pointing to the .msp patch file through the following steps:
C:>\<full path if required>\msiexec.exe /p <full path to the .msp>
In the syntax above, the /p is specified to indicate that a patch is being applied.
Example:
C:>\msiexec.exe /p C:\RevSP\PLTS30_Reviewer41_SP1.msp
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