A firewall helps protect your mobile PC by preventing unauthorized users from gaining access to your computer through the Internet or a network. It acts as a barrier that checks all incoming information, and then either blocks the information or allows it to come through. All Microsoft Windows operating systems come with a firewall, and you can make sure it’s turned on.
To activate the Windows XP Firewall
- Click Start, and then click Control Panel.
- In Control Panel, double-click Network Connections.
- In the Network Connections window, under Network Tasks, click Change Windows Firewall Settings.
- In the Windows Firewall dialog box, on the General tab, ensure that On is selected.
To activate the Windows Vista Firewall
- Click Start and then click Control Panel.
- In Control Panel, select Network and Internet.
- Under Windows Firewall, click Turn Windows Firewall on or off.
- Ensure that On is selected. display:none
