Windows Vista Error

Well, I ran into my first unknown error with Windows Vista. The Windows Update kept running in the background saying that it was downloading an update with 0% finished. This kept on for a couple of days, so I opened up the Control Panel and got one of those wonderfully vague error codes '80070020' - with no other explanation. There's an option to "Get Help" so I tried that and it just took me around in another loop of opening up Windows Update, blah, blah, blah.

So I started Googling ... and found this article: 0x80070020 The process cannot access the file because it is being used by another process.

Ok, right error code, wrong explanation. Sort of. Turns out that if you have real-time antivirus protection running it will interfere with some Windows Updates. Long story short, you have to disable your anti-virus just long enough to get the update installed. I tried that and it worked. Lesson learned.