Hi, Gillike,
Method 1: Reset Your browser
https://www.computerhope.com/issues/ch001748.htm
Method 2: Reset the Internet Protocol
Refer the site mentioned below:
How to reset Internet Protocol (TCP/IP)
http://support.microsoft.com/kb/299357.
Method 3: Reinstall the network adapters
a. Click on Start, type devmgmt.msc in search box, hit enter
b. Right click the device and click uninstall. Restart the computer and let the driver be installed.
How can I reset the Hosts file back to the default?