32bit Uninstall and Reinstall PowerShell Script

Below is a script that will automatically uninstall and reinstall a 32bit application.

Please note: This script only works with 32bit applications!

In order for this script to work, you will need to configure the following:
$Appname = Insert Application Name
$AppSetup = Insert Application File Path After MSIEXEC /I
$Silent = Insert Silent Install Switches
$SilentUninstall = Insert Silent Uninstall Switches

I am using TightVNC for the following example:

$appname = 'TightVNC'
$32bit = get-itemproperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Select-Object DisplayName, DisplayVersion, UninstallString, PSChildName | Where-Object { $_.DisplayName -match "^*$appname*"}
$appSetup="msiexec /i tightvnc-2.7.10-setup-64bit.msi"
$silent = " /quiet /norestart ADDLOCAL=Viewer"
$silentuninstall = " /qn"

if ($32bit -eq "" -or $32bit.count -eq 0) {
                Write-Host "Software is not Installed"
                Start-Sleep -s 3
                Clear-Host
                Write-Host "Starting Setup..."
                cmd /c ($appSetup + $silent)
                Clear-Host
                Write-Host "Installation Complete!"
                Start-Sleep -s 3
}
else {
    
                $Uninstallstring = $32bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x'
                Write-Host "Uninstalling Software..."
                cmd /c ($uninstallstring + $silentuninstall)
                Clear-Host
                Write-Host "Starting Setup..."
                cmd /c ($appSetup + $silent)
                Clear-Host
                Write-Host "Installation Complete!"
                Start-Sleep -s 3
           
}

Enjoy!