This Powershell Script will search through your registry and locate uninstall strings for your 32bit and 64bit programs. It is very easy to use and all you have to do is type in the name of the program to locate the uninstall string.

$appname = read-host "Enter your program name"
$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 ($64bit -eq "" -or $64bit.count -eq 0) {

    switch ($32bit.DisplayName.count) {
        0 {Write-Host "Cannot find the uninstall string" -ForegroundColor Red}
        1 {
            if ($32bit -match "msiexec.exe") {
            $32bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x'
            }
            else
            {
                $32bit.UninstallString 
            }
            }
        default { Write-Host "Please Narrow Down Your Search" -ForegroundColor Red }
    }
}
else {
 
    switch ($64bit.DisplayName.count) {
        0 {Write-Host "Cannot find the uninstall string" -ForegroundColor Red}
        1 {
            if ($64bit -match "msiexec.exe") {
                $64bit.UninstallString -replace 'msiexec.exe /i','msiexec.exe /x'
            }
            else
            {
                $64bit.UninstallString 
            }
            }
        default { Write-Host "Please Narrow Down Your Search" -ForegroundColor Red }
    }
}

Enjoy!