My PC has internet connection, but I cannot open websites. What happened?

If you are still able to use internet services, such as Instant messaging applications or email, but just cannot surf the web, this could mean your router is having a DNS problem and it cannot resolve the URL.

Check with your internet service provider for an alternative DNS server address and modify it in the router's configuration.

Alternatively, you may set a static DNS server IP address for the PC if you do not have access to the router's configuration.