Has anyone else had this problem?

my next point is going to be that you may have failing hardware... either modem, router or adapter... test hardware first with something you KNOW is working... try with XP/VISTA first, then go to 7... if it works fine with XP/Vista and not 7, then its a driver... if doesnt work with 7 or XP/Vista... 98% says its failing hardware, 2% says no good driver for any OS.

So I can go back to Vista from Windows 7?