It is important to be aware of the risks when using public computers for online banking and shopping. Here are a few things you can do to ensure safe practices when transacting online on public computers:

1. Be sure to use a secure wi-fi network whenever possible.
2. Log out of your accounts after each session, and clear your browser's cache.
3. Be aware that keyloggers could be installed on public computers, so never type in sensitive information such as bank account numbers or passwords.
4. Make sure to use a virtual keyboard to login and enter confidential information.
5. Using a web browser's private window or incognito mode is recommended.
6. Be sure to check that web addresses are typed correctly and begin with https to ensure the safety of your transactions.