I have cable internet and I am using a wireless D link DI-614 wireless router. My best friend is visiting me (she is on a Windows PC, if it matters) and when we are both using the internet actively, it cuts out intermittently. So if we are both browsing, pages won't load, we'll get error messages saying we aren't connected to the internet, etc - maybe every 5-10 minutes. Both of us experience slowed access even when it DOES work. Neither of us is doing anything intensive and I have a very fast connection normally. My Mac Pro is connected via ethernet to the wireless router, only my friend is using the wireless, but we BOTH have the same problems. Again, only when we are simultaneously actively online. Never problems if just one of us is online. I have tried changing the wireless channel and type of encryption, to no avail. I don't have an extra ethernet cable long enough to reach to her computer, to see if that would help. Suggestions? ETA: Problem is not intermittent but continuous. Computers cannot be actively using internet simultaneously.