added show-updates script

tools/show-updates.cmd

@@ -0,0 +1,6 @@
+@echo off
+call check-for-admin
+if %ERRORLEVEL% neq 0 exit /b
+
+powershell -command %TOOLS%\show-updates.ps1
+

tools/show-updates.ps1

@@ -0,0 +1,43 @@
+# show all updates ...
+
+function Convert-WuaResultCodeToName {
+
+  param([Parameter(Mandatory=$true)] [int] $ResultCode)
+  $Result = $ResultCode
+
+  switch($ResultCode) {
+    2 { $Result = "Succeeded" }
+    3 { $Result = "Succeeded With Errors" }
+    4 { $Result = "Failed" }
+  }
+    
+  return $Result
+}
+
+function Get-WuaHistory {
+
+# Get a WUA Session
+$session = (New-Object -ComObject 'Microsoft.Update.Session')
+
+# Query the latest history starting with the first record
+$history = $session.QueryHistory("",0,50) | ForEach-Object {
+  $Result = Convert-WuaResultCodeToName -ResultCode $_.ResultCode
+
+  # Make the properties (hidden in com properties) visible.
+  $_ | Add-Member -MemberType NoteProperty -Value $Result -Name Result
+  $Product = $_.Categories | Where-Object {$_.Type -eq 'Product'} | Select-Object -First 1 -ExpandProperty Name
+  $_ | Add-Member -MemberType NoteProperty -Value $_.UpdateIdentity.UpdateId -Name UpdateId
+  $_ | Add-Member -MemberType NoteProperty -Value $_.UpdateIdentity.RevisionNumber -Name RevisionNumber
+  Write-Output $_
+
+}
+
+# Remove null records and only return the fields we want
+$history |
+  Where-Object {![String]::IsNullOrWhiteSpace($_.title)} |
+  Select-Object Result, Date, Title
+
+}
+
+Get-WuaHistory | Format-Table
+