DH has a new laptop. Every time he connects to our wireless network it changes from a bog standard wireless network to a computer-to-computer one and knocks all other wireless devices in the house off. We have to switch the router on and off and then the other devices can get back on. I've tried resetting the router settings to no avail. I suspect DH needs to look at his settings again. He helpfully says his computer is the most powerful and that's why (ha, ha, ha). Any thoughts?
(He has a mac, the only mac in the house - the wireless network is a WPA-2 security protected one)