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Fix MSI installer errors 2502 and 2503 in Windows 10, Windows 8.1 and Windows 7

Sometimes Windows Installer starts to behave unexpectedly in various versions of Windows, including Windows 10, Windows 8.1 and Windows 7. Every error message has an error code but there is no further information given to the user about what action he should take to fix the error. I suddenly started facing one such error out of nowhere. While uninstalling any app which is shipped as an MSI package, it showed errors 2502 and 2503 and then the installation or uninstallation failed. Here is what these errors mean and how you can fix them easily.

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