This relates back to a Malware infection from last year which corrupted DNS settings on computers that were exposed and not protected by decent anti-malware software. DNS stands for Domain Name System, which in English basically means a conversion system when you enter a website address in your internet browser. So for example when you enter www.google.co.uk into your browser the DNS service converts this to numbers in the background, an IP address, which is 18.104.22.168 and other computers then know which page you want delivered to your screen. If this is corrupted then you entering the google address might deliver a page you weren’t expecting.
If your anti-malware is up to date it is highly unlikely you have been infected but there is a website where you can check, http://www.dcwg.org/ There is some more background information and a button to click which gives links to check your system, such as http://www.dns-ok.us/
If you check and have a problem or are worried you might have a virus or malware please don’t hesitate to drop me a line here or give me a call