Similar to DNS Unblocker, DNS Adlocker and DNS Keepeer, DNS Unlocker is a potentially unwanted program that is ad-supported. According to Symantec researchers' report (http://www.symantec.com/security_response/writeup.jsp?docid=2015-100112-5535-99&tabid=2) it creates the following files in Windows computers:

   '' ProgramFiles>DNS Unlocker>config.ini
    ProgramFiles>DNS Unlocker>ConsoleApplication1.dll
    ProgramFiles>DNS Unlocker>DNSCONTRERAS.cer
    ProgramFiles>DNS Unlocker>dnscontreras.exe
    ProgramFiles>DNS Unlocker>Info.rtf
    ProgramFiles>DNS Unlocker>License.rtf
    ProgramFiles>DNS Unlocker>LogoBlack.ico
    ProgramFiles>DNS Unlocker>LogoGreen.ico
    ProgramFiles>DNS Unlocker>LogoYellow.ico
    ProgramFiles>DNS Unlocker>Microsoft.Win32.TaskScheduler.dll
    ProgramFiles>DNS Unlocker>settings.ini
    ProgramFiles>DNS Unlocker>unins000.dat
    ProgramFiles>DNS Unlocker>unins000.exe
    ProgramFiles>DNS Unlocker>ZonaTools.XPlorerBar.dll
    Windir>Tasks>DNSCONTRERAS.job''

And is associated with the following registry entries:

''HKEY_LOCAL_MACHINE\SOFTWARE\5da059a482fd494db3f252126fbc3d5b
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\"{AD4E4E3D-9057-4796-8F2E-EB3CF04ED742}" = "[HEXADECIMAL VALUE]"''


Here is a screenshot of DNS Unlocker:


The program is mainly distributed via bundling and is also reported to be featured in some online advertisements, offering free access to geo restricted sites.

This is an open discussion. You can ask questions, provide people with your experience of the program and also help others. Write something by clicking on the '➳Reply' button below.

Here is a video with removal instructions for this PUP. Feel free to like, subscribe and comment on it:

''https://www.youtube.com/watch?v=PKYQxxyooXU''

In order to detect and remove the potentially unwanted program DNS Unlocker it is advisable to download an anti-malware tool and run a deep system scan. Have in mind that when all harmful files are deleted from the system the settings of your DNS server address could remain modified. So you should check them manually and configure the changes. Most Windows users could access these settings by entering their Network and Connection panel and them navigate to:

Properties > Internet Protocol V4 > Properties > Advanced > DNS tab

 In case that you need further help with accessing these settings enter here.

Furthermore, ensure that your router is secure. Here you can find how to check your router for malware and how to configure its DNS settings.