Recently, I decided to make a Powershell script that will make it easier for larger environments to uninstall and upgrade software. This is a continuation of the script that I wrote a while back ago that can find uninstall strings for 32 and 64bit applications (Link). Similar to the previous script, this script will automatically find the uninstall string for the specified program, but now it will also uninstall the program and install an upgraded version with the install file that you picked.

Here is everything you will need to configure for this script to work:

The following 3 variables must be used:
$appname = YOUR APPLICATION NAME
$uninstallswitches = YOUR UNINSTALL SWITCHES
$installswitches = YOUR INSTALL SWITCHES

The following variable is not mandatory but you can add it if you need to:
$transformfile = TRANSFORM/MST FILE GOES HERE

You will only need to specify one of the following variables:
$MSIfile = MSI FILE GOES HERE (EXAMPLE: C:\INSTALLS\SETUP.MSI)
$EXEfile= EXE FILE GOES HERE (EXAMPLE: C:\INSTALLS\SETUP.EXE)

Please keep in mind this is version 1 of the tool. If you have any issues, please feel free to comment below or send me a message from the contact page!
A download for this script can be found at the bottom of this post.

#Customizable Information
#The appname variable cannot be empty, please insert name of software
$appname = ""
#Insert your uninstall and install silent switches below
$uninstallswitches = ""
$installswitches = ""
#If you are using an MSI file please insert the location of the file in the MSIFile variable.  Please insert all EXE installs into the EXEfile variable
$MSIfile = ""
$EXEfile = ""
#Insert your transform file location in the transformfile variable.  This is not a required field
$transformfile = ""

if ($transformfile) {
    $transforms = "TRANSFORMS=`"$transformfile`""
}
else {
    $transforms = ""
}

$toolversion = "V1"
if ($MSIfile -or $EXEfile) {
    if ($appname) {
        #Retrieves Uninstall Strings
        $32bit = get-itemproperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Select-Object DisplayName, DisplayVersion, UninstallString, PSChildName | Where-Object { $_.DisplayName -match "^*$appname*"}
        $64bit = get-itemproperty 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' | Select-Object DisplayName, DisplayVersion, UninstallString, PSChildName | Where-Object { $_.DisplayName -match "^*$appname*"}                                                                                                                                                                                                                                                                                                                                                
        if ($MSIfile) {
            $filecheck = Test-Path -LiteralPath "$MSIfile"
            if($filecheck -eq $true) {
                #IF YOU SPECIFIED AN MSI INSTALL FILE
                if ($64bit -eq "" -or $64bit.count -eq 0) {
                    switch ($32bit.DisplayName.count) {
                        0 { 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname"
                            Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname - Done"
                            Start-Sleep -s 4
                        }
                        1 {
                            if ($32bit -match "msiexec.exe") {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $32bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x' 
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait 
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4

                            }
                            else {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $32bit.UninstallString 
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4
                            }
                        }
                        default { 
                            Write-Host "Found multiple installations" -ForegroundColor Red 
                            exit 
                        }
                    }
                }
                else {
  
                    switch ($64bit.DisplayName.count) {
                        0 { 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname"
                            Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname - Done"
                            Start-Sleep -s 4
                        }
                        1 {
                            if ($64bit -match "msiexec.exe") {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $64bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x' 
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait 
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4
                            }
                            else {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $64bit.UninstallString 
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "msiexec.exe" -ArgumentList "/i `"$MSIfile`" $transforms $installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4

                            }
                                }
                        default { 
                            Write-Host "Found multiple installations." -ForegroundColor Red 
                            exit 
                        }
                    }
                }
            }
            else {
                Clear-Host
                Write-Host "Error - Cannot find your MSI file" -ForegroundColor Red
            }
        }
        else {
            $filecheck = Test-Path -LiteralPath "$EXEfile"
            if($filecheck -eq $true) {
                #IF YOU SPECIFIED AN EXE INSTALL FILE 
                if ($64bit -eq "" -or $64bit.count -eq 0) {
                    switch ($32bit.DisplayName.count) {
                        0 { 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname"
                            Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname - Done"
                            Start-Sleep -s 4

                        }
                        1 {
                            if ($32bit -match "msiexec.exe") {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $32bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x'
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4

                            }
                            else {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $32bit.UninstallString 
                                Start-Process -Filepath "$uninstall" -ArgumentList "$uninstallswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4
                            }
                        }
                        default { 
                            Write-Host "Found multiple installations" -ForegroundColor Red 
                            exit 
                        }
                    }
                }

                else {
                    switch ($64bit.DisplayName.count) {
                        0 { 
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname"
                            Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                            Clear-Host
                            Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green ; Write-Host "Installing $appname - Done"
                            Start-Sleep -s 4
                        }
                        1 {
                            if ($64bit -match "msiexec.exe") {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $64bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x'
                                cmd /c ("$uninstall" + ' ' + $uninstallswitches)
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4
                            }
                            else {
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname"
                                $uninstall = $64bit.UninstallString 
                                Start-Process -Filepath "$uninstall" -ArgumentList "$uninstallswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done"
                                Start-Sleep -s 4
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname"
                                Start-Process -Filepath "$EXEfile" -ArgumentList "$installswitches" -wait
                                Clear-Host
                                Write-Host "***Uninstall and Install Tool $toolversion***" -ForegroundColor Green; Write-Host "***********************************" -ForegroundColor Green; Write-Host "Uninstalling $appname - Done" ; Write-Host "Installing $appname - Done"
                                Start-Sleep -s 4

                            }
                        }
                        default { 
                            Write-Host "Found multiple installations." -ForegroundColor Red 
                            exit 
                        }
                    }
                }
            }      
            else {
                Clear-Host
                Write-Host "Error - Cannot find EXE file" -ForegroundColor Red
            }
        }
    }
    else {
        Clear-Host
        Write-Host "Error -  Appname variable is empty." -ForegroundColor Red
    }
}
else {
    Clear-Host
    Write-Host "Error - Please provide install file in the MSIfile or EXEfile variable" -ForegroundColor Red
}       
            
                


Download the .ps1 below:


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