To protect your online privacy while using public computers, here are some suggested steps to take:

1. Disable the computer's built-in web camera.
2. Disconnect from the internet when not actively using it.
3. Do not install any third party applications on the computer.
4. Use disk encryption software to secure your data.
5. Use a virtual private network (VPN) when using public Wi-Fi networks.
6. Log out of online services before leaving the computer.