As the title explains, I have that issue with wifi max. Within an hour or two of inserting the wifimax, I enter system manager only to see that my cpu is at 30%. When I remove the dongle it goes back to zero. I assume someone has connected to it or something like that. I have it working perfectly(except for this) and when I play my ds, I don't have anything strange happen. All my settings are secure and it only accepts one mac address and is protected with a wep key which is a shared key. I would really appreciate any help. Thanks all.