How to remove (uninstall) Open4u

In this item, we'll explain you about two significant things: what is Open4u and how to get rid of it. We will also tell you how to defend the PC from other undesired programs.

Open4u

Such viruses as Open4u are being considered advertising-oriented: the utility that is absolutely not useful and does not have even one helpful function. Moreover, advertising programs cause noticeable harm to the computer in total, and that harm grows proportionally to the time that the adware spent within the OS. Most adware are the products of one developer. Other swindlers using them only change the logo, in scarce cases making minor improvements, and usually not investing any efforts, just purchasing a ready-made package for distribution of adware at illegal auctions. The cause for the broad dissemination of adware can be explained literally by a single phrase. Advertising tools allow swindlers to earn a lot of money while staying in complete safety. Naturally, the most grandiose swindles such as botnets, including myriads of devices, engage the attention of intelligence agencies, but smaller games, in most cases go unpunished. The cause for this is that advertising programs, like any legal tool today, has specified functions, and prior to installing this program, the user formally admits the terms for its usage, by checking the checkbox. Usually, no one reads terms and conditions, and this directly benefits scammers.

 

It's time to look at adware's actions and the fruits of infestation. Open4u is circularized over the Web using plain technique called affiliate installation. The essence of this manner consists in affiliating 3-4 advertising programs in one package with one useful program, and publishing it for chargeless admittance. If the useful software present in the pack is really helpful, the advertising programs will rapidly take over the Internet. Such technique is plain and cheap, and allows fraudsters to accomplish several aims simultaneously:

  • Sponsored installation doesn't take many time and funds: swindlers only must place perilous bundle in the network once, and betweentimes control it to ensure that download is still working.
  • Fraudsters are flawlessly protected via technique of extension, as people voluntarily install the viruses and accept the conditions for their employment.
  • Each batch contains 4-5 viruses, which means that, hackers do not need to create a separate presentment and a web-page for each of them.

The bundle's speciality is that victim can't affect it except for the installation. Through installation the victim is shown a checkbox where he needs to select from two installing methods - "safe" and "partial". The names of those methods can vary somewhat according to the version, but the substance is analogous. In paid software, the emergence of such a window means that the customer can select the preset settings or delete meaningless applications, but in Open4u's case such option is the last chance to protect the workstation from virus infestation. If the customer just clicks "OK", or willfully opts the "safe" technique, then everything that's in the bundle get through the protection of his computer.

Methods to remove Open4u

Measures of the virus in the OS take place according to the established scenario: installing, switching the browser preferences, tacking additional values to the registry, protecting against removal, and beginning to work. In a few minutes after the installation, Open4u starts popping up advertisement in your browser, in the form of spam, annoying ads, malicious links and pop-ups that occur in the most aggravating locations. Advertisement appears on each website, even on the ones that newer displayed any advertisement, and often surpasses the navigation modules or significant information, such as the video that you are going to watch. In accordance to that, web-criminals induce the user to click on the banners, although he's not concerned in the suggestions given there. Every single click brings hackers few cents, but if you multiply it by the daily number of clicks, and then by the multiplicity of infested systems - you'll see how much they get. You really need to know how to disallow hackers from earning from you, and restore the computer to its previous condition. This can only be done via one method: by removing Open4u from the system.

Method 1. Use special removal software

Method 2. Remove Open4u manually

Step 1. Uninstall Open4u from the operation system

Step 2. Remove Open4u from the browser (Google Chrome/Mozilla Firefox/IE/Opera/Safari/Edge)

 

If you are MAC user, follow this guide How to remove virus from MAC

We know just two techniques to delete Open4u from the system: manual or self-acting uninstalling. In this paragraph we'll define each of them, and also assist you to pick the manner is the most suitable. Let's start with manual uninstalling: this technique is very easy and completely free, but has serious drawbacks in the case of removal of two viruses or more. The more viruses in the computer, the less well it operates, and it will take more time, eliminating lots of undesired tools. Manual cleaning can consume hours of efforts, and after lots of executing similar doings, the probability of a mistake grows greatly. Besides that, if you are not an expert user, you might need someone's assistance. For expert computer operators, manual deletion is a good option, but for beginners, it appears to be too complex. Automatic removal via an antivirus program, unlike, requires no skills, and consumes way less time than manual way. Frankly, you just need to install the antivirus tool and launch the scanning operation. The whole deletion will go on without your interference and you will only have to acknowledge the removal of the found viruses. We might offer you an anti-viral program which is an outstanding counterpart to expensive utilities from top-notch brands. This antivirus is called Spyhunter, and it has all the pros of famous tools, but suggests them at admittable cost. Among the benefits of Spyhunter experts notice round-the-clock technical support, affordable price, high speed of spotting and removal of undesired software, oft-repeated database renewal and compatibility with modern antivirus utilities. If you like this proposal - just click the link below and purchase Spyhunter. If you're not ready to purchase something immediately - use the gratis proposal and install a free scanning module that will help you to evaluate the system condition.

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Instructions for manual deletion

Step 1. Uninstall software from the system

Windows 7

1. Uninstall Open4u from Control Panel

  • Start
  • Control Panel
  • Programs
  • Programs and Features
  • Uninstall a program
  • Select Open4u and press Uninstall

2. Delete elements that stayed after uninstalling from Control Panel

  • C:\Program Files\Open4u
  • C:\ProgramData\Open4u
  • C:\Users\YOUR_USER\AppData\Roaming\Open4u

3. Clean registry:

  • Click Start
  • Type Regedit.exe
  • Search for "Open4u" and delete these elements

 

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Windows 10

1. On the field Search Windows type 'Control Panel'

2. Click Uninstall a program

3. Select Open4u and press Uninstall

 

Windows 8

1. Point to the upper-right corner of the screen, move the mouse pointer down, and tap Search.

2. Enter control panel in the search box, and then click Control Panel.

3. Under View by:, select Large Icons, and then click Programs and features.

4. Click the program, and then click Uninstall.

5. Follow the instructions on the screen.

6. Delete Open4u from Control Panel

  • Start
  • Control Panel
  • Programs
  • Programs and Features
  • Uninstall a program
  • Select Open4u and press Uninstall

7. Remove elements like on Win7.

 

Step 2. Remove Open4u from the browser

Internet Explorer

Step 1. Disable add-on:

  • Tools
  • Manage add-ons
  • Remove Open4u

Step 2.Change homepage:

  • Tools
  • Internet Options
  • General
  • Home page
  • Put “about:blank”

Step 3. Change new tab page:

  • Tools
  • Internet Options
  • General
  • Tabs

 

Google Chrome

Step 1. Remove add-on:

  • Customize and Control Google Chrome
  • More Tools
  • Extensions
  • Remove Open4u

Step 2. Change homepage:

  • Customize and Control Google Chrome
  • Settings
  • Open a specific page or set of pages
  • Delete all specific pages

 

Mozilla Firefox

Step 1. Delete add-on:

  • Open menu
  • Add-ons
  • Extensions
  • Remove Open4u

Step 2. Change homepage:

  • Open menu
  • Options
  • General
  • Put “about:blank” into Home page field

 

Opera browser

Step 1. Disable add-on:

  • Open Opera;
  • Customize and Control Opera;
  • Extensions;
  • Choose Open4u and press button "Remove from Opera"

Step 2. Change homepage:

  • Open Opera browser;
  • Customize and Control Opera;
  • Settings;
  • On Startup;
  • Open a specific page or set of pages;
  • Press button "Set pages" and change Homepage to your favorite one.

 

Safari

Step 1. Start Safari browser

Step 2. Display a menu of General Safari Settings

Step 3. Reset Safari...

Step 4. Press "Reset"

 

Microsoft Edge

Step 1. Delete the suspicious extensions.

  • Menu
  • Extensions
  • Choose unfamiliar extension
  • Press Uninstall

Step 2. Change homepage.

  • Go to the website of the search engine you want
  • Select More actions
  • Settings
  • View advanced settings
  • Change search engine
  • Select search engine you want and Set as default

 

Video how to reset browser and remove all extensions

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