Windows Updates recently automatically installed two .NET 4 updates. Almost immediately my system began misbehaving: my Firefox Booksmarks toolbar disappeared along with all the bookmarks it held, the shutdown/sleep/lock/logoff button in the start menu changed selection each time the Start menu was opened, desktop icons moved and/or disappeared each time the desktop was opened. I uninstalled the two updates (Kb2468871 and Kb 2533523) and the system returned to normal. I hid those 2 updates and changed my update setting to "notify but don't download" so MS doesn't install .NET updates I didn't know about BUT I am concerned that those 2 updates are still stored in my system. I know that Windows stores updates in C:\Windows\Software Distribution\Download. My dilemma is that there are more than 30 folders/files stored there and I can determine the contents of only the 2 folders. I can't open the files so I don't know which of them to delete to remove the .NET 4 updates. I've been installing MSE updates manually for the past week. How can I clear my system of those 2 hidden .NET updates?