I have a small home network consisting of a desktop PC, a wireless router, and a laptop with wireless network card. Up until last week, it was all working fine, with the laptop being able to access shares on the PC, and having no problems accessing the Internet. Now, the laptop cannot access the PC, although it still recognizes that it is there. As well, if I try to access the Internet using Firefox or Opera (preferred browsers), the browser times out and hangs around in a zombie state; if I try to access the Internet with Internet Explorer (least preferred option), there is no problem. I have been checking out various tips on debugging networking problems, and I have found that the laptop can ping the PC and the router by IP address, but times out when it tries to ping its own IP address. Also, if I try to access a DNS to resolve a name, it results in a zombie-state process. I have eliminated hardware problems with the router - the PC can access the Internet and shares on the laptop with no problem through the router. I have eliminated a hardware problem with the wireless network card - IE can get out to the Internet, and I have also tried to connect the laptop to the router with a cable with the same results. Any suggestions as to further diagnostics to try running, or on steps I could take to fix the problem? Many thanks.