Security
Broadband provides your computer with a high-speed connection to the web. Normally, this is always on as long as the computer is on. This leaves you more vulnerable to security threats because the internet connection potentially provides permanent access to your computer from the outside world.
To protect yourself, you need to install a firewall. A firewall acts like a security guard on your computer, monitoring inbound and outbound traffic and preventing unauthorised access. Talk to your ISP about which firewall is recommended and when and how it should be installed.