First, download the Microsoft Authenticator app, which is available for iOS and Android, and log in. Select the Security tab, ...

Enter the verification code you receive and click Continue. Two-factor authentication should now be enabled with the Security screen showing that it's turned on.

What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure.

If it's a setup key you're given, go to Settings -> Passwords, select the account from the list, then tap Set Up Verification Code.... Finally, tap Enter Setup Key in the pop-up menu and enter the ...

Once you enter your verification code, Google will want to confirm your identity again by sending another code to a recovery email address. After this you will be able to create a new password.

Enter the verification code and select “Continue.” Text Message: Please enter your mobile phone number and select “Send Code” to receive a verification code through text message.

In order to enable two-step verification on your Dropbox account, you'll need to sign into the Dropbox website and open your account menu (by clicking on your name, in the upper-right corner).

The verification code is generated when major changes are made to your account, and in most cases, when someone’s deliberately typed in your details for the system to generate a one-off code.

David Bisson explains how you can protect your Dropbox account from hackers with two-step verification.

If you forget your account password or can't receive the verification codes, you may lose it forever. To avoid such situations, we compiled a list of solutions to help you recover your Google account.