Possibly your iP is duplicated with another one using the network
To fix this:
Method 1:
Right click on Network icon, Reset it
Method 2:
Start > Cmd: Then type:
ipconfig /release
Ipconfig /renew
Method 3: If this is winshock confict with TCP/IP
CMD , then type:
netsh winsock reset catalog
netsh int ip reset reset.log hit
Method 4
Set static IP for network
RIght click on network , > properties > this conntection uses the following items > uncheck "Internet protocol v6"