Update Mysterious-MessyCode.ps1

Mysterious-MessyCode.ps1

@@ -1 +1,77 @@
- $Uninstallers = Get-ChildItem HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*;($Uninstallers|% {$a=$_;Get-ItemProperty -name UninstallString -Path "$($a.name.replace('HKEY_LOCAL_MACHINE','HKLM:'))" -ErrorAction SilentlyContinue|? {(Get-ItemProperty -name DisplayName -Path $a.name.replace('HKEY_LOCAL_MACHINE','HKLM:')).DisplayName -like '*Carbon*'}}).UninstallString
+#set default variables
+$appToUninstall = "keyword"
+$appList = ""
+[Int]$numberOfMatches = 0
+#prompt for keyword of program to uninstaller if it hasn't been manually changed in the script above
+if ($appToUninstall -eq "keyword"){
+  $appToUninstall = Read-Host "Enter keyword of program you wish to uninstall"
+}
+#create an array of apps from the registry that match the keyword
+function Search-Apps{
+  #path for uninstallers for both 32 and 64 bit programs
+  $regPath = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
+  #create an array of uninstallable objects from the registry that contain the supplied keyword
+  $global:appList = Get-ChildItem -Path $RegPath | Get-ItemProperty | Where-Object {$_.DisplayName -match $appToUninstall }
+  #number of matching programs
+  $global:numberOfMatches = $appList.displayName.count
+}
+
+Search-Apps
+
+#if there are no matches ask for another keyword
+while($numberOfMatches -eq 0){
+  $appToUninstall = Read-Host "There were no programs that matched the entered keyword. Please enter a new keyword"
+  Search-Apps
+  }
+#display the number of matching programs
+Write-Output "there are $numberOfMatches installed programs that match"
+#display the list of matching prgrams with thier index value
+$indexLineValue = 0
+Write-Output $appList.displayName | % {“$indexLineValue $_”;$indexLineValue++}
+#function that uninstalls the programs that are passed in as an array. Silently if possible
+function Uninstall-Program($uninstallList){
+  ForEach ($version in $uninstallList) {
+    If ($version.QuuietUninstallString) {
+        $uninst = $version.QuuietUninstallString
+        Start-Process cmd -ArgumentList "/c $uninst"
+     }
+     If ($version.UninstallString) {
+         $uninst = $version.UninstallString
+         Start-Process cmd -ArgumentList "/c $uninst /s /q /norestart" -NoNewWindow
+     }
+   }
+}
+
+#confirm uninstallation of all programs
+$confirmation = Read-Host "Would you like to uninstall all programs? [y/n]"
+if ($confirmation -eq 'y') { #if confirmed silently uninstall all programs
+  Uninstall-Program($appList)
+  #verify that the app was uninstalled by searching the registry for it
+  Search-Apps
+  if ($numberOfMatches -eq 0){
+    Write-Output "$appList.displayName has been successfully uninstalled or the uninstaller has launched"
+  }else{
+    Write-Output "An error has occured. Please try again."
+  }
+}else { #if you do not want to uninstall all the apps in the list offer to install just one of them
+  $confirmation = Read-Host "Would you like to a specific program from the list? [y/n]"
+    if ($confirmation -eq 'y') {
+      $singleAppToDeleteIndex = Read-Host "enter the number at the beggining of the line of the app you would like to uninstall"
+      $singleAppToDelete = $appList[$singleAppToDeleteIndex]
+      $confirmation = Read-Host "You have selected to uninstall" $singleAppToDelete.displayName". Proceed? [y/n]"
+        if ($confirmation -eq 'y') {
+          $deleteAppName = $singleAppToDelete.displayName
+          Uninstall-Program($singleAppToDelete)
+          Search-Apps
+            if ($appList | Where-Object ($_.displayName -eq $deleteAppName)){
+            Write-Output "An error has occured. Please try again."
+          }else{
+            Write-Output "$deleteAppName has been successfully uninstalled or the uninstaller has launched"
+            }
+        }else { #if n was entered in response to the confirmation prompt
+          Write-Output "No changes have been made to the system"
+        }
+      }else { #if n was entered in response to the confirmation prompt
+        Write-Output "No changes have been made to the system"
+      }
+}