Open a command prompt and type:
netsh int ip reset c:\resetlog.txt
Reboot the computer.
1. "c:\resetlog.txt" is the name of the log file which will be created by the process. This can be changed.
2. Resetting the Internet Protocol might be necessary if the routing table gets corrupted and won't automatically remove or add dynamic routes. The routing table can be accessed by typing route print in a command prompt.