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Quick fix

It Worked Yesterday. What Changed?

That is completely believable. Updates, expiring credentials, network changes, and background processes can all change behavior overnight, even when you did nothing.

  1. Restart the computer properly.
  2. Think about what changed: an update, a new app or extension, a password change, a new location or network.
  3. Check the date and time. A wrong clock causes login failures, email trouble, certificate errors, and sites that will not load.
  4. For a website or web app, try a private/incognito window. If it works there, a bad extension or cached data is the cause.
  5. Check the network: correct Wi-Fi, and whether another device has the same problem.
  6. Write down the exact error message before you do anything else.

Do not wait

If the change was clicking a link, opening an attachment, or entering a password somewhere unusual, ask David immediately.

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