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Een Internet Firewall kan je helpen voorkomen dat buitenstaanders je computer bereiken via Internet. Als je Microsoft Windows® XP hebt schakel dan de ingebouwde firewall in. Heb je een oudere versie van Windows, kijk dan naar de "Learn About Firewalls page".

1. Druk deze pagina af
2. Wees er zeker van dat je Windows XP draait. Om dit te doen, klik Start, en klik dan Uitvoeren; in de Uitvoeren dialoog box, typ winver. klik OK. Dit zal je zeggen welke versie van Windows je gebruikt.
   Als je  Windows XP niet draait  kijk dan naar de "Learn About Firewalls page".
3. Klik Start, en klik dan Configuratiescherm.
4. Klik Netwerkverbindingen, en klik dan LAN of snelle Internet-verbinding.
   
   Tip: Als de LAN of snelle Internet-verbinding categorie niet zichtbaar is, klik Switch to Category View on the upper left of the window.
5. Under the Dial-Up or LAN or High Speed Internet category, click the icon to select the connection that you want to help protect.
6. In the task pane on the left, under Network Tasks, click Change settings of this connection (or right-click the connection you want to help protect, and then click Properties).
7. On the Advanced tab, under Internet Connection Firewall, check the box next to Protect my computer and network by limiting or preventing access to this computer from the Internet.
   
   
8. If you have more than one connection to the Internet, such as broadband and a dial-up connection, then repeat steps 5 through 7 for each connection.

If you have more than one computer, want more technical information, or just want to learn more about Internet firewalls, see the Learn About Firewalls page.

Your Windows XP operating system includes the Automatic Updates feature which can automatically download the latest Microsoft security updates while your computer is on and connected to the Internet. To get the most out of Automatic Updates, run a Windows Update scan on your computer first.

1. Click Start, click All Programs, and then click Windows Update.
2. Follow the directions on your screen. Windows Update will scan your computer and give you a pre-selected list of critical updates.
   
   Tip: To reduce download times, run Windows Update when you will not be using your computer for other tasks. Your download times will vary depending on how long it has been since you last updated, the number and size of files being downloaded, and your modem speed.
   
   Slower modems may take several hours to download all recommended updates the first time you use Windows Update.
3. Install the updates.
   
   Tip: Some updates have prerequisites; therefore, you may be asked to install certain updates and then reboot your machine. Be sure to go back to Windows Update after rebooting to check for any additional downloads. You may need to do this several times.

Now that your Windows XP is up to date, establish a regular maintenance schedule with Automatic Updates.

1. Click Start, and then click Control Panel.
2. Click Performance and Maintenance.
   
   Tip: If the Performance and Maintenance category is not visible, click Switch to Category View on the upper left of the window.
3. Click System to open the System Properties dialog box.
4. On the Automatic Updates tab, check the box next to Keep my computer up to date.
5. Choose a setting. Microsoft strongly recommends choosing Automatically download the updates, and install them on the schedule that I specify.
6. If you choose the option to automatically download and install the updates, you must then select a day and time for your computer to install the downloaded updates. With this option, updates are downloaded in the background when your computer is connected to the Internet.
   
   Tip: Be sure to pick a day and time when your computer will be turned on. We recommend a daily update. Always save your work before leaving your computer, because some downloads require your computer to reboot.

   

Using these instructions will help ensure your computer downloads and installs updates.

If you see a notification balloon like the one below when using your computer, new updates are ready to install. Click the notification balloon to review the downloads and install them.

For in-depth information on using Automatic Updates, visit the Learn About Updating Your Computer page.

Step 3: Use Up-to-Date Antivirus Software

An antivirus software program will help protect your computer against most viruses, worms, Trojan horses, and other malicious code. Many new computers come with antivirus software already installed. However, antivirus software requires a subscription to stay up to date. If you don't have a current subscription for these updates, your computer is likely to be vulnerable to new threats.

Be sure to activate your antivirus software subscription before using e-mail or the Internet. (Viruses are commonly passed via e-mail and downloadable files.) If you do not have antivirus software on your system, or if you need more information about antivirus software, see the Learn More About Antivirus Software page.