Hello!
Since I couldn't find an answer anywhere, I'm going to ask you for help. The thing is, I used to browse the Internet through my Dell Vostro A860 Laptop, but yesterday its built-in WiFi modem just stopped working for no obvious reason. It is no longer shown in Device Manager or Adapter Settings, driver cannot be reinstalled (QMI module does not exist, whatever that means), reinstalling Windows 7 is not a solution either. I've been running Wamp server on it for a month or two, but to make it work I had to use DMZ mode on my TP-Link router, which opens all common ports (not that I'm dumb enough not to know how to forward my ports, it just didn't work). On the other hand I used AVG PC TuneUp's turbo mode before it happened. AVG Internet Security's Firewall has also been working for a bit long. The Diagnostics tool says I haven't plugged in the Ethernet cable or it could be damaged. I think that is all the info I currently have, if you need more - ask.
Thanks in advance.