Troubleshoot Internet Explorer in Windows XP by checking whether the Windows Firewall is configured properly. Check the status of the network adapter drivers via the Device Manager dialog box and resetting TCP/IP protocol settings. Additionally, check if the Internet Explorer settings are the problem by using the Reset option. Uninstall any recently installed third-party programs in case they’re causing conflicts with the browser.
Modify or disable the Windows Firewall as needed by clicking on the Windows Firewall link in the Control Panel, and selecting the Off option in the General tab. To check the driver status, access Device Manager from the Control Panel, double-click on Network Adapters, and double-click on the network adapter your Internet connection is using. Open the Driver tab, and enable the device or perform an update by clicking the Update Driver button.
To reset IP settings, open the Start menu, select the Run option and type “netsh winsock reset” in the Open field. Click OK, and restart the computer when prompted. To reset Internet Explorer settings, click on Tools in the Menu bar. Select Internet Options, open the Advanced tab, and click the Reset button. Once the reset completes, close all active Internet Explorer windows, restart Internet Explorer, and check whether the problem is resolved. If this fails, type “sfc /scannow” in the Open field of the Run dialog box, and click OK to repair corrupted system files.