i have an Intel Centrino Wireless-N 2200 internal wireless card on my laptop, which is a Lenovo Z580 running 64-bit Windows 7. I've sent this laptop back to the manufacturer twice to fix a physical HDD problem (which they eventually got right -_-), and to fix this problem here: my wifi card is somehow screwed completely. it will run for anywhere between 2 minutes to an hour or so, and then suddenly it losses all connectivity to everything, but leaves my with "limited access" to what ever router i was connected to, or so it says. in reality, it just completely loses all connections, like the radio switch was turned off, and to get it back, i used to have 2 options: restart the computer, or disable then re-enable the card. the later option used to bluescreen me, and then freeze the bluescreen, but that is fixed. so was the card, for about a week. now it simply disappears from the device manager, in such a way that reinstalling the drivers doesn't work because i apparently don't have a wifi card to install drivers for. so currently, im plugged straight to the router with an ethernet cord. if anyone can help me figure out what the hell is going on, that would be awesome, especially if they could help me fix this.