It started a couple of weeks ago. I have had this computer since September. The Wi-Fi will begin to slow, then go away completely. If you look at nearby networks, it acts as if there are none. If you turn the Wi-Fi off and back on, nothing happens. The computer needs to be restarted to see networks and connect again. It happens maybe once a day, always at random, but this morning it happened about 5 times in a half hour time period while I was trying to do homework, and at one point the screen even just went grey and I had to force shut down. I'm not sure what's wrong but it's quite upsetting.