How to resolve Windows Vista Update error 800B0100

If you’ve tried to install recommended updates in Windows Vista, and receive error 800B0100, this tutorial offers the most common solution to that problem.

windows vista update error 800B0100

  1. The solution, in a nutshell, is to disable your firewall. If you’re using McAfee Personal Firewall Plus, F-Secure Internet Security, Norton Internet Security or another Firewall vendor, see its respective support page for assistance in disabling it (temporarily). If you’re using the built-in Vista Firewall, keep reading.
  2. Open the Control Panel and select Security.
  3. windows vista control panel
    click to enlarge

  4. Select Turn Windows Firewall on or off.
  5. windows vista control panel security section
    click to enlarge

  6. Select Off (not recommended), click Apply and then OK.
  7. windows vista firewall disabled
    click to enlarge

  8. Back at the Windows Update screen, click the Try again button.
  9. windows vista update retry
    click to enlarge

  10. The download(s) and installation should start…
  11. windows vista update manager
    click to enlarge

  12. and this time successfully install. If a restart is required, make sure to re-enable your Firewall once your PC restarts.
  13. windows vista update manager successfully updated
    click to enlarge

If this article helped you, I'd be grateful if you could share it on your preferred social network - it helps me a lot. If you're feeling particularly generous, you could buy me a coffee and I'd be super grateful :)

buy a coffee for

Home » Security » How to resolve Windows Vista Update error 800B0100

4 thoughts on “How to resolve Windows Vista Update error 800B0100”

  1. Works for windows 7 as well. I looked for help at Microsoft website and they made me run tons of diagnostics which didn’t help. Your solution was quick and easy. Thank you.

Leave a Comment

Your email address will not be published.