When using a public computer for sensitive tasks, there are a number of risks that you need to be aware of and take the necessary steps to mitigate.

1. Make sure to enable the operating system’s security features such as encryption and firewall protection.
2. Avoid using public WiFi networks when handling sensitive tasks, as they are vulnerable to cyber threats.
3. Never leave any personal or financial information on the computer you are using. If possible, use an external USB drive or cloud storage to save and transfer data.
4. Ensure your online accounts have strong passwords and use two factor authentication as an added security measure.
5. Keep your anti-virus and anti-malware programs up to date to prevent and detect malicious software.
6. Be aware of phishing scams and always verify the authenticity of websites and emails before entering any personal or financial information.