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

Powershell handles tasks like this fairly handily:

$productCode = (gwmi win32_product | `
                ? { $_.Name -Like "*" } | `
                % { $_.IdentifyingNumber } | `
                Select-Object -First 1)

You can then use it to get the uninstall information as well:

$wow = ""
$is32BitInstaller = $True # or $False

if($is32BitInstaller -and [System.Environment]::Is64BitOperatingSystem) 
{
    $wow = "\Wow6432Node" 
}

$regPath = "HKEY_LOCAL_MACHINE\SOFTWARE$wow\Microsoft\Windows\CurrentVersion\Uninstall"

dir "HKLM:\SOFTWARE$wow\Microsoft\Windows\CurrentVersion\Uninstall" | `
? { $_.Name -Like "$regPath\$productCode"  }