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I'm one of today's best-selling computer book writers, with more than 15 million books in print.

This website keeps you up-to-date on my books, and your computers. Each week, I answer a reader's question on-line.

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Tag: Code 646 Windows Update encountered an unknown error

Fixing pesky Windows Updates that refuse to install

Q: Windows Update says three important updates are available. But the downloads always fail, leaving an error code of 646. I’m frustrated. Can I simply delete those updates? If they never install, what’s the point of my computer continually reminding me that they are available for downloading? What do you recommend? A: Some updates not […]