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Verify path from Registry UninstallString to remove QGIS software RRS feed

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    Hi!

    I'm trying to make a script that will search the registry for uninstall string of different QGIS versions and uninstall them all.

    The problem is that on some computers there are few versions of QGIS and some of them are already uninstalled but the registry key is still there and the script fails when it can't find a valid path.

    In this specific example when I add to the code "write-host $version.UninstallString" to list paths to uninstallers the output will be like this:

    C:\Program Files\QGIS 2.14\Uninstall-QGIS.exe
    C:\Program Files\QGIS 2.18\uninstall.exe
    C:\Program Files\QGIS Lyon\Uninstall-QGIS.exe

    The last path for QGIS Lyon dosn't exist anymore and script fails.  How can I include a verification method to check if the path really exist?  

    Here is the code sample:

    Best Regards!

    $QGISUninstall = Get-ChildItem -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall | Get-ItemProperty | Where-Object {$_.DisplayName -match "QGIS*" } | Select-Object -Property DisplayName, UninstallString

foreach ($version in $QGISUninstall) {
if ($version.UninstallString) {

$uninstall =$version.UninstallString

write-host $version.UninstallString
Start-Process $version.UninstallString
}


}

    • Edited by binary-lab Monday, July 23, 2018 8:11 AM Changed title to more specific
    Monday, July 23, 2018 8:08 AM

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    help test-path -online

    \_(ツ)_/

    Monday, July 23, 2018 8:14 AM
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    Hello,

    Please check below:

    $Path = (Test-Path "C:\Program Files\QGIS 2.14","C:\Program Files\QGIS 2.18","C:\Program Files\QGIS Lyon")

    if ($Path) {
    $QGISUninstall = Get-ChildItem -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall | Get-ItemProperty | Where-Object {$_.DisplayName -match "QGIS*" } | Select-Object -Property DisplayName, UninstallString

    foreach ($version in $QGISUninstall) {
    if ($version.UninstallString) {
    $uninstall =$version.UninstallString
    write-host $version.UninstallString
    Start-Process $version.UninstallString
        }
        }
    }

    else { Write-Host "Folder doesn't exist"}

    (Please remember to "Mark as Helpful/Mark as Answer" if applicable)


    Monday, July 23, 2018 8:22 AM
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    Thanks! Your answer was helpful. 

    Here is my final code.

    Get-Process | Where-Object { $_.Name -like "qgis*" } | Select-Object -First 2 | Stop-Process -Force

$QGISUninstall = Get-ChildItem -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall | Get-ItemProperty | Where-Object {$_.DisplayName -match "QGIS*" } | Select-Object -Property DisplayName, UninstallString

foreach ($version in $QGISUninstall) {
if ($version.UninstallString) {

$uninstall =$version.UninstallString

write-host $version.UninstallString

if (test-path  $version.UninstallString) {
Start-Process $version.UninstallString /S -Wait
}
else { Write-host "Mappen finns inte längre"}

}
}

Start-Sleep -Seconds 10
$rensa = 'HKLM:\SOFTWARE\QGIS*', 'C:\ProgramData\Microsoft\Windows\Start Menu\Programs\QGIS*', 'C:\program files\QGIS*', 'C:\Users\Public\Desktop\Qgis*', 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\QGIS*', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\QGIS*'
foreach ($skräp in $rensa) {
if (test-path $skräp) {
Remove-Item $skräp -Recurse -Force
}
else { Write-Host "redan rensat"}
}

Start-Process QGIS-OSGeo4W-3.2.1-1-Setup-x86_64.exe /S -Wait

    Monday, July 30, 2018 1:30 PM