How to find the UpgradeCode and ProductCode of an installed application in Windows 7

Question

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 t

Answer 1

If you have msi installer open it with Orca (tool from Microsoft), table Property (rows UpgradeCode, ProductCode, Product version etc) or table Upgrade column Upgrade Code.

Try to find instller via registry: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall find required subkey and watch value InstallSource. Maybe along the way you'll be able to find the MSI file.