Windows Update - How to resolve issues encountered
Usually, the Windows Update process works smoothly for Patch Tuesday security updates. The newer Microsoft Update is a better choice as it includes Office security updates as well. Sometimes, an issue can surface and I've found that searching on the error message code can almost always point out a good solution. You can also contact Microsoft for free support in some cases if there are no documented solutions (e.g., search on "Microsoft PC Safety")
Below is an example of resolving an issue from the important August updates:
Patch Tuesday - Client update issue 0x8DDD0007 Registry error during update
ISSUE ENCOUNTERED - REGISTRY ERROR DURING UPDATE
Read more about steps you can take to resolve this problem (error number 0x8DDD0007) yourself.
SEARCHED ON ERROR MESSAGE
http://www.bing.com/search?q=0x8DDD0007
KEY LINK
http://support.microsoft.com/kb/948065
WHAT WORKED FOR ME (solution #1 from KB)
1. Installed all the successful updates
2. Reboot
3. Another Microsoft Update (manually invoked)
4. Ran the final update in a standalone mode with no other applications running
5. Reboot
6. Invoked Microsoft Update one final time to ensure all updates had been applied