I have a laptop (a HP Compaq Presario R4000, running Windows XP) which is connected to a wireless network. There are two other computers connected to the same network (another laptop, which I am using at present) and a PC) - these two are having no problems at all.
Whenever I try to load a website on Firefox it comes up with Address Not Found (using the URL in the location bar). When I put the IP address in instead (for example for Google) it comes up with Network Timeout.
Windows Live Messenger will not sign in. It comes up with an error message which says "We were unable to sign you into Windows Live Messenger at this time. Please try again later." (Error code: 80072ee7).
I clicked the troubleshoot button. The following tests were fine - IP, Default Gateway, IE's Offline Setting, Hosts File, Proxy Server, Wireless. The DNS and Key Ports are flagged up as not being ok.
It says the following:
"Failed to connect to the service. THis could be due to improper proxy or firewall settings. Please review your proxy and firewall settings."
I have checked the proxy settings (there isn't one) and have checked that it is not blocked by my firewall.
When I click the repair button it says it was unable to identify and repair the connection problem.
Any help would be much appreciated.