It sounds to me like a network problem you say you can't connect wired or wirelessly so I assume you access the internet through a router correct? If so check to see if the internet light is on on the router. Also if its a DNS Issue you can use an alternative DNS Such as OpenDNS:
Anyone know if Kaspersky is giving problems with Win7? My network access dropped out of nowhere, now Windows says it cant connect to the dns server. I did a dnsflush, I also did a system restore. The only things on my comp are Kaspersky Camtasia and a Internet School app called NovaNET. Other small apps are; VLC, Firefox,uTorrent, I installed K-Lite Codec Mega pack. All these apps have been on for about 3-4 days. My comp started up with my network working so I didnt think of installing any drivers for my MB, I dont think it would matter much anyways cause this is Win7.
Any help would be fantastic.