Remove Trojan.u83 “Virus” from Chrome, Firefox, Explorer

This article can help you to remove Trojan.u83 Virus. The step by step removal works for every version of Microsoft Windows.

As you figured out already, Trojan.u83 is a Trojan horse. That means you’re stuck with one of the most problematic and dangerous types of infections. Trojans are a complete and utter pest. Hence, as soon as you encounter this program’s presence on board, it is time to take action. Locate the parasite and get rid of it for good. There’s no reason for you to be tolerating the tricky, harmful Trojan. Trojan.u83 works behind your back. It firstly modifies some default PC settings. Obviously, your permission isn’t part of the picture. Hackers aren’t trying to enhance your online experience. They are solely trying to harm you. If the dreaded Trojan.u83 spends enough time on your computer, things will get out of hand. The sooner you uninstall this program, the better. Trojan.u83 messes with your system registry and modifies some important system files. It also leads to a poor PC performance. Note that such parasites serve as back doors to malware as well. In other words, Trojan.u83 could help some other vicious infection get installed. The virus alters some files and damages others. Its shenanigans cause your machine to crash or freeze so browsing the Web becomes impossible. Furthermore, the parasite might make modifications in your browser settings too. Trojan.u83 could inject all your favorite browsers with a pile of sponsored, unreliable web links. In that scenario, consider your everyday online activity efficiently destroyed. The one thing such a program could generate are potentially corrupted ads. We’re talking pop-ups, pop-unders, banners, interstitials, etc. Not a single commercial displayed by a virus is to be trusted. You might also get redirected to questionable websites and come across fake software updates. Restrain yourself from clicking any of the ads this infection may generate. If you click the wrong commercial, you’ll compromise your safety further. To prevent that, stay away from all dubious pop-ups on your PC screen. Put your security first because Trojan.u83 exposes you to cyber threats on a daily basis. This nuisance must be uninstalled on the spot.

Remove Trojan.u83

How did I get infected with?

The most likely explanation is that Trojan.u83 was sent to your inbox. You see, this method allows all sorts of infections to get installed in silence. If you click a corrupted email-attachment open, you end up installing viruses. However, there might be a whole bunch of parasites in a single seemingly harmless email/message. Stay away from anything you find unsafe. It only takes one wrong move online to download infections. Thus, be careful what you give green light to. The Trojan might have also been attached to some freeware/shareware bundle. Next time you download bundled programs, be cautious. Opting for the custom option in the Setup Wizard could save you quite the hassle afterwards. Instead of skipping installation steps, keep an eye out for malware. Make an effort to protect your computer and you’ll see that it is worth it. In addition, stay away from unverified websites. These pages often offer highly questionable software which may turn out to be harmful. Last but not least, Trojans travel the Web via bogus torrents, program updates and corrupted third-party pop-up ads. Be attentive when surfing the Internet and don’t overlook any potential threat.

Why is this dangerous?

The parasite wreaks havoc in silence. It could even cause you some privacy issues because hackers now get access to your private data. For instance, your browsing history, usernames, passwords, email addresses, IP addresses. What is much more troublesome, though, is the fact Trojan.u83 could get to your bank account details. This program could steal some of your personally identifiable information thus leading to some immense trouble. As you could imagine, hackers won’t hesitate before they sell your data for marketing purposes. The problem is, your information may easily end up in the wrong hands of people with unclear intentions. That may result in financial frauds or identity theft. Trojan.u83 gives you no reason to keep it on your computer system. On the other hand, the virus provides you plenty of reasons to uninstall it. The sooner, the better. Please follow our detailed manual removal guide. You will find it down below.

Manual Trojan.u83 Removal Instructions

The Trojan.u83 infection is specifically designed to make money to its creators one way or another. The specialists from various antivirus companies like Bitdefender, Kaspersky, Norton, Avast, ESET, etc. advise that there is no harmless virus.

If you perform exactly the steps below you should be able to remove the Trojan.u83 infection. Please, follow the procedures in the exact order. Please, consider to print this guide or have another computer at your disposal. You will NOT need any USB sticks or CDs.

STEP 1: Track down Trojan.u83 related processes in the computer memory

STEP 2: Locate Trojan.u83 startup location

STEP 3: Delete Trojan.u83 traces from Chrome, Firefox and Internet Explorer

STEP 4: Undo the damage done by the virus

STEP 1: Track down Trojan.u83 related processes in the computer memory

  • Open your Task Manager by pressing CTRL+SHIFT+ESC keys simultaneously
  • Carefully review all processes and stop the suspicious ones.


  • Write down the file location for later reference.

Step 2: Locate Trojan.u83 startup location

Reveal Hidden Files

  • Open any folder
  • Click on “Organize” button
  • Choose “Folder and Search Options”
  • Select the “View” tab
  • Select “Show hidden files and folders” option
  • Uncheck “Hide protected operating system files”
  • Click “Apply” and “OK” button

Clean Trojan.u83 virus from the windows registry

  • Once the operating system loads press simultaneously the Windows Logo Button and the R key.


  • A dialog box should open. Type “Regedit”


Depending on your OS (x86 or x64) navigate to:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run] or
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] or

  • and delete the display Name: [RANDOM]

delete backgroundcontainer

  • Then open your explorer and navigate to: %appdata% folder and delete the malicious executable.

Clean your HOSTS file to avoid unwanted browser redirection

Navigate to %windir%/system32/Drivers/etc/host

If you are hacked, there will be foreign IPs addresses connected to you at the bottom. Take a look below:


Step 4: Undo the possible damage done by Trojan.u83

This particular Virus may alter your DNS settings.

Attention! this can break your internet connection. Before you change your DNS settings to use Google Public DNS for Trojan.u83, be sure to write down the current server addresses on a piece of paper.

To fix the damage done by the virus you need to do the following.

  • Click the Windows Start button to open the Start Menu, type control panel in the search box and select Control Panel in the results displayed above.
  • go to Network and Internet
  • then Network and Sharing Center
  • then Change Adapter Settings
  • Right-click on your active internet connection and click properties. Under the Networking tab, find Internet Protocol Version 4 (TCP/IPv4). Left click on it and then click on properties. Both options should be automatic! By default it should be set to “Obtain an IP address automatically” and the second one to “Obtain DNS server address automatically!” If they are not just change them, however if you are part of a domain network you should contact your Domain Administrator to set these settings, otherwise the internet connection will break!!!


  • Check your scheduled tasks to make sure the virus will not download itself again.

How to Permanently Remove Trojan.u83 Virus (automatic) Removal Guide

Please, have in mind that once you are infected with a single virus, it compromises your whole system or network and let all doors wide open for many other infections. To make sure manual removal is successful, we recommend to use a free scanner of any professional antimalware program to identify possible virus leftovers or temporary files.

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