Wired and Wireless Network Problems

Windows 7 Home Premium 64 bit. Kaspersky Internet Security 2013. Actiontec GT742WG. I lost internet connection a couple of weeks ago so powercycled my modem. Since then I've had nothing but network problems. The above computer is ethernet wired to my modem and I have a wireless network for a couple of other computers and 2 Droid phones. I haven't been on the other 2 computers for some time...