Here are some great tips on keeping your computer and data safe when using public Wi-Fi hotspots.
Make sure your firewall is activated
A firewall will help protect your laptop by preventing unauthorized users from getting access to your computer through the Internet or a network. The Firewall will act as a block to protect your data which will check all incoming traffic and then either stop the traffic or allow it through.
Make your folders private and encryption
When you use a public Wi-Fi network encryption will more often than not be out of your control. It is important to make sure the folders on your laptop are private, this can make it harder for hackers to access your files. To further secure your files you should consider encrypting them, which requires a password to open or modify them. You can learn how to encrypt a file here
Don't type in credit card numbers or passwords
Try to avoid typing any sensitive information, such as your passwords, credit card number or any other financial information while you use a public wireless network. If you must enter credit card numbers while using a public wireless network make sure there is a locked padlock icon at the bottom right corner of the browser window, and make sure the Web address begins with https: (the "s" stands for secure).
Try to choose more secure connections
Opt for wireless networks that require a network security key or have some other form of security such as a certificate. The traffic sent over these networks is encrypted which will help to protect your computer data. The security features of different networks appear along with the network name as your PC discovers them.
Disable file and printer sharing
File and printer sharing is a feature that enables other computers on a network to access resources on your computer. When you are using your mobile PC in a hotspot, it's best to disable file and printer sharing—when it's enabled, it leaves your computer vulnerable to hackers. Remember, though, to turn this feature back on when you return to the office.
Consider completely removing sensitive data from your notebook PC
If you're working with extremely sensitive data, it might be worth removing it from your laptop altogether. Instead, save it on a corporate network share and access it only when necessary. This way, you have multiple safeguards in place.
Turn off your wireless network when you're not using it
If you're not surfing the Internet or sending e-mail, but still using your computer in an area where there is a public wireless network, disable your wireless connection.