Now on the Firefox, I get redirected to s.coldsearch.com which has the basic feature of a regular search engine. For this, I can’t access to my website. I tried to set the DNS to 8.8.8.8/8.8.4.4, but it didn’t work. Finally, the search information from the network told me that my PC has been infected by malware. But the antivirus program esetnode32 finds nothing on my PC. How can I fix the redirect issue?