Just yesterday my computer began to turn off my internet connection and restart it! This means that I can be on-line for about 1 minute at a time, and then suddenly the connection is gone. It starts up again, and then a minute later disconnects.

This is not a problem on the other two computers in the house: both are also macs (MacBooks from 2009 and 2011).

I've had my computer (MacBook Air) for just over 12 months, and this has never been a problem. The modem is new, it was installed about 2 months ago. This is a Wifi connection. The modem is Netgear.

Any clues about what is going on?