It is interrupting most pages from loading on the devices in my network. Here are the steps so far I have taken:
Ran ipconfig/flushdns command in cmd.
Removed irrelevant IP addresses in hosts file.
Important thing is that my router's DNS address is always changed to some random site.I cleared it around 5-6 times. Still I think it will be changed. Scanned router with ESET Smart Security 10. Also scanned systems with Kaspersky and ESET. What I found strange is that the URL still remains original even after appearence of that error. I reinstalled Google Chrome. But, it is still appearing.
My router is a DLINK DIR 600 M.