OuiSys Ads Removal Guide — How to Fix It?

OuiSys pop-up notices can show up unexpectedly, covering the post of the page you explored or opening your browser when you do not want it to be opened.

Clicking the OuiSys advertisement may lead to the injection of other malware or unwanted programs. In this article, you will see the guide of OuiSys popups clearing in a couple of methods, as well as examining your personal computer for extra viruses existence.

It is better to prevent, than repair and repent!

Removing OuiSys manually may take hours and may damage your PC in the process. I recommend you to download GridinSoft Anti-Malware for threats removal. Allows to complete scan and cure your PC during the trial period.

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What are OuiSys pop-ups?

OuiSys popups are a consequence of adware action. Adware is a kind of malware that shows you the pay-per-view of pay-per-click advertisements, which produces a large volume of income for adware suppliers. These promotions might contain explicit composition, or have a link to malicious content/website, due to the fact that adware maintainers have no purpose to inspect the goodness of the material they are going to show – their solitary target is cash.

OuiSys push notification.

Pop-up marketing itself is a very good, low-cost and really productive marketing solution¹. It makes it possible for the seller to link the buyers’ interest to their site, and the customers to get the dynamic updates on the goods they want to buy. When the person will get a pop-up notification that the TV set he desires to buy is provided at the online shop he/she saw previously with a 15% price cut, one will certainly use this possibility and purchase it. Considering the very small cost for the popups and their targeting, such an advertising instrument is a favorite thing amongst the advertising departments of huge online sellers.

Nevertheless, such a profitable system could not be missed by virus creators. Option to demonstrate the popup ads by force to the targets of malware invasion is an excellent basis for malicious tricks with the popup advertisements. And Ouisys.com promotions is just one of hundreds that are “employed” in this system.

Here is a short info for the OuiSys

How have I got the OuiSys virus?

There are a huge amount of ways of getting infected by the adware that lead to the OuiSys popups tornado. A lion’s part of this computer virus cases is after the freeware or cracked programs, that are distributed on the peering networks. Freeware can additionally be downloaded from the main website, and the adware is supplied as a legitimate bundled program.

There is no need to blame yourself. A huge amount of people often work with the uncertain programs from untrusted sources: abandonware, a wide range of tools that are free of cost, and even hacked programs. All of these types of software are dangerous, since it is very easy to build in a OuiSys malware under the cover of part of the license hacking script, or as a part of the self-made algoritm within the Windows optimization tool.

OuiSys popup malware may also be hidden in the advertisement somewhere on the odd site. Such websites are typically packed with bright and blinking advertisements, and their owners often accept any promotions to be published on their web page. Therefore, clicking on such banners is a risky thing: only the ad provider realizes what will occur when you click this advertisement. Besides some “light” viruses, like adware or unwanted programs, you can also get something much more dangerous, like ransomware or coin miner; the large share of coin miners circulation is exactly after the malicious ads.

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

Potentially undesirable programs, like OuiSys pop-up virus may initiate a lot of troubles on your personal computer. Distracting is not the single problem – pop-up notifications can show you the advertisements, where you are offered to get another strange application, or “a effective anti-malware tool”. Scareware is often distributed with the last motto. Potentially unwanted applications, in turn, may have spyware functions. And it is quite hard to distinguish the undesirable app from a normal one, if you don’t know the exact names. Besides the PUPs and fake antiviruses, popup-related banners are also chosen as a distribution way by different trojan viruses, for example – coin miners. The consequences of activity of such viruses is 100% unpleasant, and can cost you several hundreds of dollars. And even if you are not interacting with these banners, they can be clicked by someone who also uses your computer – parents, children, spouse, etc. So the things can become much more serious, and it will be much harder to deal with it without data loss. It is recommended to remove the viruses with anti-malware programs as soon as possible.

How can I get rid of OuiSys pop-up advertisements?

The manual of OuiSys adware clearing includes 2 sections. Initially, we need to remove the malware, and after that correct the consequences of its activity. The removal process is really easy, due to the fact that it can be performed even with using Microsoft Defender – security program that is available on all personal computers with Windows 8/10. Nevertheless, as a result of its huge resources consumption, along with some failures that can be critical for some groups of users, Defender is oftentimes turned off by the users, so its utilization is most likely impossible. Moreover, a variety of trojan viruses can disable the embedded antivirus. It is much better to make use of the separated program that will not have such vulnerabilities.

I would certainly recommend you to utilize Gridinsoft Anti-Malware² – a well-proven anti-malware device that will certainly wipe out the viruses from your PC and also make an invulnerable shield with a Proactive protection function. However, let’s manage OuiSys adware initially.

Removing OuiSys 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.

• 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.

• When the scan is over, you may choose the action for each detected virus. For all files of OuiSys malware the default option is “Delete”. Press “Apply” to finish the malware removal.

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. 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. In the next screen, find the “Refresh Firefox” option :

After choosing this option, you will see the next message :

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 browsers are reset, you need to ensure that your browser will definitely connect the proper DNS while connecting to the site you want. Create a text file named “hosts” on your computer’s desktop, then open it and fill it with the following text³:

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 issue that makes the things much more difficult to fix, especially without the anti-malware software. Most of adware variations that are used to show you the OuiSys pop-up advertisements are modifying the deep browser settings, disabling an access to the settings tab. So, if you try to fix your browser settings after your system was penetrated by pop-up-related malware, your browser will crash quickly. In some cases, you will see no crash, but significant lag spike after pressing the “settings” key. Browser will stop reacting for ~ 30 seconds, and after that it will be back to the normal, until you try to open settings again.

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.

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.

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 OuiSys Pop-ups?

Name: OuiSys

Description: OuiSys - 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 Ouisys.com push notifications?” or “why do Ouisys.com pop-ups keep appearing on Chrome even after AdBlock installation?”. In this article we will show you how to deal with OuiSys 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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1. More about pop-up ads on Wikipedia.
2. GridinSoft Anti-Malware review and also the reasons why I advise it for malware removal.
3. Official Microsoft guide for hosts file reset.