Get Rid of Jqn.opttools.net Pop-up from Chrome/IE/Firefox

My PC is infected with Jqn.opttools.net pop-up which can bring into a lot of pop-up ads and I have tried all methods I can to remove it, but none of them are helpful. Could you help me to remove it to avoid further damage?

Description of Jqn.opttools.net

Jqn.opttools.net Pop-up is a dangerous adware that comes from infamous websites. This adware contains a lot of pop-up ads and misleading information such as fake software update notifications. For example, “You should update your edition of media player” may pop up to ask you update your program every time you surf the Internet. If you click Update without carefulness, you may be redirect to some unwanted webpages which may contain spyware or malware. As a result, you will be attacked by a lot of viruses. Your PC performance would be affected because this virus can consume a lot of system resources.
Moreover, you will be redirected to some unsafe websites and your search results will be added a lot of unrelated content. Jqn.opttools.net may add many malicious toolbars or extensions to your system automatically. In fact, Jqn.opttools.net adware virus is created by cyber criminals to increase traffic and promote some certain websites, thus you shouldn’t believe in any information on the pages. What you should do is to take action to get rid of it from your browsers.

Screenshot of Jqn.opttools.net

Annoyances that are caused by Jqn.opttools.net:

1.Jqn.opttools.net virus will slow down your PC speed, so you cannot use your PC smoothly.
2.Lots of ads keep popping up when you surf the Internet.
3.Jqn.opttools.net virus will disable your antivirus program and help other viruses attack your PC
4.Redirect problem will happen all the time.

Steps to remove Jqn.opttools.net virus:

1.Stop all vicious processes of Jqn.opttools.net from Task Manager
To do this, you can hit Ctrl+Shift+Esc at the same time to open the Task Manager. But you should know that the virus’s name may vary from one to other, so you should be careful.

2.Display all hidden files so as to remove Jqn.opttools.net's files
To show all hidden files from PC, please follow these steps:
①Click Start Menu and click Control Panel

②Click Appearance and Personalization and click Folder Options

③Go to View tab, tick Show hidden files and folders and deselect Hide protected operating system files (Recommended)

④Click OK
3.Remove all malicious files and keys from Registry Editor
To do this, you can click on Start Menu and click Run. When a dialogue pops up, you should type "regedit" in the box and click OK.

Then you will see the following Screenshot:

Now, please remove the following keys from the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\run\
HKCU\Software\Microsoft\Windows\CurrentVersion\
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Temp
Note: you should know that any mistake changes happen in the registry will cause other serious system problems. So before you make some changes, you should back up your registry first!

How to Open & Back up the Registry