I wish to higher the security level of my account. How do I activate/deactivate 2-step verification?

You can enable your 2-step verification by visit Login & Security on HTC account website (account.htcvive.com). Go to Recovery Method & 2-step Verification, click on Activate next to 2-step verification. Follow the instruction to complete the process. After activation, you will be need to provide both your credential and verification code each time you login, and login via social media is not included.