Question

A list of every update and hotfix that has been installed on my computer, coming from either Microsoft Windows Update or from the knowledge base. I need the ID of each in the form of KBxxxxxx or some similar representation…

Currently I have:

const string query = "SELECT HotFixID FROM Win32_QuickFixEngineering";
var search = new ManagementObjectSearcher(query);
var collection = search.Get();

foreach (ManagementObject quickFix in collection)
    Console.WriteLine(quickFix["HotFixID"].ToString());

But this does not seem to list everything, it only lists QFE’s.

I need it to work on Windows XP, Vista and 7.

Answer 1

You can use IUpdateSession3::QueryHistory Method.
The properties of the returned entries are described at http://msdn.microsoft.com/en-us/library/aa386400(VS.85).aspx

Set updateSearch = CreateObject("Microsoft.Update.Session").CreateUpdateSearcher
Set updateHistory = updateSearch.QueryHistory(1, updateSearch.GetTotalHistoryCount)

For Each updateEntry in updateHistory
  Wscript.Echo "Title: " & updateEntry.Title
  Wscript.Echo "application ID: " & updateEntry.ClientApplicationID
  Wscript.Echo " --"
Next

edit: also take a look at http://msdn.microsoft.com/en-us/library/aa387287%28VS.85%29.aspx