How to find the UpgradeCode and ProductCode of an installed application in Windows 7
I have an application installed on my machine. I also have its source code but somehow the ProductCode and UpgradeCode of this application were changed. Now I want to get the UpgradeCode and ProductCode of this installed application. I feel there must be some tool for this. Can anyone kindly let me know how to get the UpgradeCode and ProductCode of an installed application? IMPORTANT : It's been a while since this answer was originally posted, and smart people came up with wiser answers. Check How can I find the Upgrade Code for an installed MSI file? from @ Stein Åsmul if you need a solid and