So, I'm having trouble with my Mac Mini 2,1. It is an older Mac, but it serves me quite well. My problem is this: After starting it up, the internet connects to my Airport Extreme Base Station and when I launch Safari everything works fine. Over time (about 30 minutes) the connection starts to degrade and ultimately, drops. So far, I've done the following: I swithched the DNS to a public DNS. I changed the channel on the router. I've restarted the Mac, the router, and the modem numerous times (including complete power off and power on resets). I've installed and run Sophos Anti-Virus software (nothing detected) Other things you should know: I have several other devices on the Base Station (iPad, iPhone, couple of laptops, a Wii, a TiVo), but they were running on the station long before these problems began. About a year ago, I cracked open the Mini for the first time and upgraded the HD and memory. WiFi worked fine afterwards. If I click on the Airport signal icon in, it will flash between "Airport: On" and "Airport: Looking for Networks" its only for a split second, but it looks like it is struggling to stay connected. I tend to leave my computer on all the time. The computer otherwise works fine. Based on these facts, does anyone have any ideas on what might be wrong? Thanks! PS: My apologies if this is discussed elsewhere, I just couldn't find a post with my computer's symptoms.