There are quite a few times that Windows Update gets stuck with bizarre error codes. At first I tried Microsoft Windows Update Troubleshooter, but it did not help in most of the cases. . There are various sites that suggest a manual, long and tedious process to reset Windows Update, but better yet - there is a script which automates this process, so with only a few keystrokes it runs this process properly, fast and easy. This script certainly helped me, so I guess it will help you too. Give it a try.