Protecting your information in most retail shops is hard. This is as generally, many people in your business have access to your system. We used to set up all our clients with a secret VeraCrypt drive to get over this problem. No-one can read that drive unless they have the password. To get your information, they need your password to log into your VeraCrypt program. This makes your information secure on an open network.
This is one of the best and trusted encryption software for Windows.
You can get a copy of the software here.
For an explanation on how to use it and set it up, look here.
If you are going to use it, here are some tips.
1) Never use AES+SHA-512. There are many other options, so select something else. This is because if someone is trying to break into your system, they will assume you are using it.
2) Do a complete shutdown when you finish with Veracrypt. You can do this by hold down the SHIFT key on your keyboard and then click the "Shut down" option in the Start Menu. This is because your password is in RAM, and the hibernation file
3) Use a new password and make it long. Almost all cracked systems are because someone knows or guesses your password, e.g. your child's birth date.
4) Make a "Hidden VeraCrypt volume" for your sensitive information.
Doing this is another advantage too if your computers are lost or stolen, no one can read your private information.
Enjoy your privacy.