What is DNS Unlocker and how to remove 'ads by DNS Unlocker'

DNS Unlocker is a new wide-spread adware that can damage users' computers. The developer's of this program says that it can help us to unlock webpages from different Geo locations. However, the only one effect is an amazing amount of pop-ups and banners 'Ads by DNS Unlocker'.
There are different ways to delete the adware. If you have a light form of infection, you need only to disable add-on in your browser. Also, check Programs in Control Panel. But sometimes, user needs to change default network settings:
Control Panel -> Network and Internet -> Network and Sharing Center -> Change Adapter Settings > Right-click your active internet connection and select Properties
Scroll down: you will find Internet Protocol Version 4 (TCP/IPv4) > Select Properties > Select Automatic options: "Obtain an IP address automatically" and "Obtain DNS server address automatically"
Additional information: DNS Unlocker removal guide

Why adware is dangerous?

Internet-advertising becomes progressively intrusive, annoying from year to year. The number of pages increases very fast, and there’s plenty of commercial on each of them. It overwhelms the sites which you attendance, social networks, you receive ads on the mail and browser pop-ups. No one enjoys its, and users began to put special settings in the browser to remove the intrusive commercials. But there are also adware adware. De facto, adware is a type of malware that is not aimed at flawing or deleting elements, only to change the browser default settings. Why virus does it? Customer is forced to see the ads, that adware presents him. Malware switches browser settings to unblock hype, search engine lets precarious outcome and some of the harmful websites becomes the home page. Peril of such activities is that, notwithstanding adware itself does not harm, but the websites which it advertises, are captured with far more serious viruses. So, if man takes such ad and attempts to either purchase or download something from a malicious website - he instantly gets a bunch of adware to his PC.

How to deal with those programs, and how to shield the PC from them?

To uninstall viruses from your hard drive, first you shall find it. When you spot an increased amount of hype, pop-ups and spam in the Internet - your system is infected with adware. Anti-virus is the most powerful tool to discover and get rid of it. If you already have anti-virus, but adware is still processing on your computer, then one antivirus is not plenty. Databases of various antivirus updates at various time and when one anti-viral program can already detect and remove a particular malware, another anti-virus still doesn't have it on it’s list. To increase your computer's protection, it is recommendable to download two antivirus on your PC. One of them has to function in the passive manner, and scan the PC sometimes, and the other must be with 'real-time protection' module, and scans incoming elements. There are plenty of different anti-virus, both paid and chargeless, and to select from this multiplicity, you'll need much time. Among the free anti-virus users preferStopzilla or Malwarebytes Anti Malware. By installing one of these tools as a primary or secondary anti-virus, you’ll instantly see that commercials has become less. In case you won't delete antivirus, it shall scan the system regularly, and risk of malware infection will be gone.