in my computer all sites are available but facebook site is not available when i tries to open facebook "this webpage is not available"comes i have window xp and i use modem for internet connection plzzzzzzzzz help me?????????????????????????

It seems that you are having trouble accessing Facebook on your computer. This issue could be caused by various factors, such as network connectivity problems or issues with the website itself. Here are some troubleshooting steps you can try to resolve the issue:

1. Check your internet connection: Ensure that your modem is properly connected and your internet connection is active. You can try accessing other websites to verify if the issue is specific to Facebook or a more general connectivity problem.

2. Clear your browser cache: Temporary files stored on your computer can sometimes interfere with website access. Clearing your browser cache can help resolve this. To do this, follow these steps:

- For Google Chrome: Click on the three vertical dots in the top-right corner of the browser, select "More tools," then "Clear browsing data." Make sure to select "Cached images and files" and click "Clear data."

- For Mozilla Firefox: Click on the three horizontal lines in the top-right corner, select "Options," then "Privacy & Security" from the left sidebar. Under "Cookies and Site Data," click on "Clear Data," make sure "Cached Web Content" is checked, and click "Clear."

3. Disable browser extensions: Some browser extensions can interfere with normal website access. Try disabling any extensions you have installed in your browser and restart your browser to see if this resolves the issue.

4. Try using a different browser: If the problem persists, try accessing Facebook using a different web browser, such as Google Chrome, Mozilla Firefox, or Microsoft Edge, to determine if the issue is specific to your chosen browser.

5. Check for antivirus or firewall settings: Sometimes, certain antivirus or firewall settings can block access to specific websites. Verify that your antivirus software or firewall settings are not blocking Facebook. If necessary, temporarily disable them and check if you can access the website.

6. Restart your modem and computer: Sometimes, a simple restart can resolve connectivity issues. Turn off your modem, wait for a few minutes, then turn it back on. Similarly, restart your computer and try accessing Facebook again.

If none of these steps resolve the issue, it may be helpful to contact your internet service provider or consult technical support for further assistance.