The problem started when my computer froze up upon my attempt to exit out of a sound-recording program. I became unable to move my mouse or do anything else. I turned the computer off and back on, and when it came back on, the first thing I noticed was that the visual theme had changed to one resembling an earlier version of Windows. I soon found a solution to that and ran some virus checks, finding some problems and fixing them. Now the remaining problem is that I can't connect to the internet. I am "connected" to my wireless network, but it says "limited or no connectivity." My IP address is listed as 0.0.0.0. When I use the "repair" option for my wireless network, it says it can't renew my IP address. It says the problem is probably with the network. Internet Explorer also says that. However, I know the problem is strictly with the computer itself because of the problems I already had with it (freezing and changing the theme). When I renew the IP address myself, it just stays the same--0.0.0.0. I can't connect to the internet this way. I use a Toshiba Portege M400-S5032 with Microsoft Windows XP Tablet PC Edition 2005. I have a Netgear 54 Mbps Wireless Router WGR614 v7. Please be patient with me, as I don't know anything about how wireless networking works, or many technical terms assosciated with it.