Turning on two-factor authentication

Enable it

1. Sign in on the website and open the security section of your profile.
2. Under Two-factor authentication, click Enable.
3. Scan the QR code with Google Authenticator (or another authenticator app).
4. Enter the 6-digit code and click Verify.

From now on, you'll enter a code from the app when you sign in on the website and in TuneUP for Windows.

Disable it

Use Disable in the same place.

Code not accepted?

Make sure your phone's time is set automatically. After several wrong codes, verification is paused for a short while; wait and try again.