Try this
Repair Winsock and TCP/IP
1. Click Start, click Run, type netsh winsock reset, and then press ENTER.
2. When the Command Prompt window flashes, restart the computer.
Warning Programs that access or monitor the Internet, such as antivirus, firewall, or proxy clients, may be negatively affected when you run the netsh winsock reset command. If you have a program that no longer functions correctly after you use this resolution, reinstall the program to restore functionality.