Remove Pu4.biz Pop-up Virus — How to Remove?

Pu4.biz pop-up notices can show up out of the blue, covering the post of the website you checked or opening your web browser when you don’t want it to be opened.

Clicking the Pu4.biz promotion can cause the injection of various malware or unwanted programs. In this post, you will see the manual of Pu4.biz popups removal in various methods, as well as inspecting your system for other malware existence.

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What are Pu4.biz pop-ups?

Quick reference

The only problem is advertising itself. It has often been said that, at times, the advertising department can become overwhelming and to the point where some customers will decide not to show their purchases anyway, such as with the famous case of the “bought-on-click-a-cart” case, in which there is no advertising in both cases at all. On the other hand, some websites like Facebook are very active (the likes of which can grow much bigger), so it is very difficult to find the right adverts.

So how can you design effective digital advertising strategies? This is often asked of digital marketers. I believe that we have always been in a strong position as an internet and mobile industry with both the use of and the creation of effective and effective digital media campaigns.

Pu4.biz popups are an effect of adware activity. Adware is a type of malware that shows you the pay-per-view of pay-per-click ads, which produces a substantial amount of income for adware suppliers. These advertisements may include explicit information, or have a web link to harmful content/website, since adware maintainers have no reason to check the goodness of the web content they are going to show – their single target is money.

Pu4.biz push notification

Pu4.biz push notification.

Pop-up advertising itself is an excellent, cheap and extremely successful advertising instrument1. It allows the vendor to attach the customers’ attention to their website, and the customers to receive the dynamic updates on the goods they want to buy. When the person will get a pop-up alert that the TV set he likes to purchase is available at the online shop he/she saw previously with a 15% price cut, one will surely use this possibility and buy it. Taking into consideration the very small cost for the popups and their targeting, such a promotion and marketing instrument is a favourite thing amongst the advertising teams of large internet sellers.

Nonetheless, such a successful plan could not be missed by virus developers. Option to demonstrate the popup ads by force to the targets of malware attack is a great basis for malevolent tricks with the popup ads. And Pu4.biz advertisements is one of hundreds that are “employed” in this scheme.

Here is a short summary for the Pu4.biz
Site Pu4.biz
Hosting AS14061 DigitalOcean, LLC
Netherlands, Amsterdam
Infection Type Adware, Push notifications, Unwanted Ads, Pop-up Ads
IP Address 167.71.64.21
Symptoms Annoying pop-up ads in the right corner.
Similar behavior Pu5, Pu6, Trkk2
Fix Tool
To remove possible virus infections, try to scan your PC

How have I got the Pu4.biz virus?

There are a number of ways of getting infected by the adware that trigger the Pu4.biz popups storm. A lion’s part of this malware incidents is after the freeware or cracked programs, that are spread on the peering networks. Free software can also be downloaded from the main site, and the adware is offered as a legit bundled program.

There is no need to blame yourself. A huge amount of people regularly utilize the dubious programs from untrusted providers: abandonware, a wide range of tools that are free of cost, or even hacked programs. Every one of these types of applications are risky, because it is quite easy to include a Pu4.biz malware under the guise of part of the license hacking script, or as a part of the self-made algoritm inside of the Windows optimization tool.

Pu4.biz popup virus may also be concealed in the advertisement somewhere on the unusual website. Such sites are generally loaded with intense and blinking advertisements, and their proprietors usually approve any kind of promos to be published on their page. For this reason, clicking on such banners is a risky thing: only the ad contractor knows what will happen when you click this ad. Besides some “light” viruses, like adware or unwanted programs, you can additionally get something a lot more damaging, like ransomware or coin miner; the big share of coin miners distribution is exactly after the malicious promotions.

People dislike popups

The statistic shows that people dislike popup advertising more than other types of promotions

Potentially unwanted programs, like Pu4.biz popup virus can cause a variety of troubles on your PC. Distracting is not the single problem – pop-ups may present you the advertisements, where you are offered to get another dubious program, or “a effective security tool”. Scareware is usually spread under the last motto. Potentially unwanted programs, in turn, may have spyware functionality. And it is pretty hard to distinguish the undesirable app from a legit one, if you don’t know the exact names. Besides the PUPs and dubious antiviruses, popup-related ads are also exploited as a spreading way by various trojan viruses, for instance – coin miners. The consequences of actions of such malware is 100% unwanted, and can cost you several hundreds of dollars. And even if you are not clicking these ads, they may be clicked by whoever who also makes use of your computer – parents, children, spouse, etc. So the situation can become much more serious, and it will be much harder to solve it without data and money loss. It is recommended to eliminate the viruses with antivirus applications as soon as possible.

How can I get rid of Pu4.biz pop-up advertisements?

The manual of Pu4.biz adware elimination includes 2 sections. Initially, we need to exterminate the malware, and afterwards repair the results of its action. The removal process is really simple, due to the fact that it may be performed even with using Microsoft Defender – anti-malware software that is available on all personal computers with Windows 8/10. Nonetheless, due to its significant resources consumption, along with some problems that can be pivotal for some kinds of users, Defender is frequently disabled by the users, so its usage is probably impossible. In addition, a variety of trojan viruses are capable to disable the embedded antivirus. It is much better to make use of the separated program that will not have such weakness.

I’d suggest you to use Gridinsoft Anti-Malware2 – a well-proven anti-malware device that will definitely remove the viruses from your computer and make an invulnerable shield with a Proactive protection function. But let’s deal with Pu4.biz adware initially.

Removing Pu4.biz popup virus with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of Pu4.biz malware the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning

Now, when the computer is clean of viruses, we can proceed to the browser reset. You can do this step manually, as well as with the use of GridinSoft Anti-Malware.

Reset browser settings to default

Manual method of browser reset

To reset Edge, do the following steps :
  1. Open “Settings and more” tab in upper right corner, then find here “Settings” button. In the appeared menu, choose “Reset settings” option :
  2. Reseting the Edge browser

  3. After picking the Reset Settings option, you will see the following menu, stating about the settings which will be reverted to original :
For Mozilla Firefox, do the next actions :
  1. Open Menu tab (three strips in upper right corner) and click the “Help” button. In the appeared menu choose “troubleshooting information” :
  2. The first step to revert Mozilla Firefox

  3. In the next screen, find the “Refresh Firefox” option :
  4. The second step of Firefox restoration
    After choosing this option, you will see the next message :
    The last step for Firefox
If you use Google Chrome
  1. Open Settings tab, find the “Advanced” button. In the extended tab choose the “Reset and clean up” button :
  2. In the appeared list, click on the “Restore settings to their original defaults” :
  3. Finally, you will see the window, where you can see all the settings which will be reset to default :
Opera can be reset in the next way
  1. Open Settings menu by pressing the gear icon in the toolbar (left side of the browser window), then click “Advanced” option, and choose “Browser” button in the drop-down list. Scroll down, to the bottom of the settings menu. Find there “Restore settings to their original defaults” option :

  2. After clicking the “Restore settings…” button, you will see the window, where all settings, which will be reset, are shown :

When the web browsers are reset, you need to ensure that your web browser will be connected the accurate DNS while connecting to the web page you need. Make a text file titled “hosts” on your pc’s desktop, after that open it and fill it with the following content3:

# Copyright (c) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a ‘#’ symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handle within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost

Find the hosts.txt file in C:/Windows/System32/drivers/etc directory. Rename this file to “hosts.old.txt” (to distinguish it from the new one), and then move the file you created on the desktop to this folder. Remove the hosts.old from this folder. Now you have your hosts file as good as new.

Nevertheless, there is one problem that makes things a lot harder to restore, specifically without the anti-malware program. Most of adware versions that are utilized to show you the Pu4.biz pop-up ads are adjusting the deep browser setups, disabling an access to the settings tab. So, if you attempt to fix your browser settings after your computer was infected by pop-up-related malware, your browser will certainly crash quickly. Sometimes, you will see no crash, however, huge lag spike after pressing the “settings” key. Browser will stop reacting for ~ 30 seconds, and then it will be back to the typical, up until you try to open settings one more time.

Reset your browser settings with GridinSoft Anti-Malware

To reset your browser with GridinSoft Anti-Malware, open the Tools tab, and click the “Reset browser settings” button.

Tools tab in GridinSoft Anti-Malware

You can see the list of the options for each browser. By default, they are set up in the manner which fits the majority of users. Press the “Reset” button (lower right corner). In a minute your browser will be as good as new.

Reset Browser Settings tab in GridinSoft Anti-Malware

The browser reset is recommended to perform through the antivirus tool by GridinSoft, because last is also able to reset the HOSTS file without any additional commands.

How to Remove Pu4.biz Pop-ups?

Name: Pu4.biz

Description: Pu4.biz - a lot of users became a target for the pop-up advertisements. I have a lot of friends who literally bombed me with the questions like “how to remove Pu4.biz push notifications?” or “why do Pu4.biz pop-ups keep appearing on Chrome even after AdBlock installation?”. In this article we will show you how to deal with Pu4.biz pop-ups, which may corrupt your browser’s correct performance, and create a lot of troubles while you are working.

Operating System: Windows

Application Category: Adware

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References

  1. More about pop-up ads on Wikipedia.
  2. GridinSoft Anti-Malware overview and also the reasons why I suggest it for malware removal.
  3. Official Microsoft guide for hosts file reset.

About the author

Wilbur Woodham

I was a technical writer from early in my career, and consider IT Security one of my foundational skills. I’m sharing my experience here, and I hope you find it useful.

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