This is not big issue, the problem is due to virus or malware. Follow these steps to resolve this issue
1. Press the Win+R and enter CMD, press enter
2. In the command line write “Netsh Winsock Reset” without the quotes, then hit Enter.'
If problem not solved then Rebooting your Modem or Router may fix the issue. Simply unplug the device from the power socket and plug it in again after at least 20 seconds have passed.
Other Solution is to stop Antivirus.