What is a Firewall?
A firewall protects your computer from online attacks. The firewall records which programs try to send and receive information from the internet. This means, for example, that if a virus program tries to forward information from your computer, the firewall will stop it untill you give your approval. If you are uncertain about whether to let the program send the information, then select not to send.
How do I get a Firewall?
Firewalls are programs that are included in the newer versions of Windows. If you buy a program with various protective functions from an antivirus supplier, it will include a firewall. It is important that you update your operative system and antivirus program, as the firewall will also be updated.