Useful Guide to Remove Trojan.ADH.2 from Your PC

Trojan.ADH.2 is a Trojan horse used by cyber hackers to gain unauthorized access to a targeted computer and further take control over it for malicious purposes. This Trojan horse is usually undetected in your computer system until you run a recently-updated antivirus program. Though this threat cannot be seen with the naked eye, you can still be aware of its existence via some symptoms showing on your computer.


After your computer gets infected by Trojan.ADH.2, you may notice a suspicious slowdown of your computer performance without any particular reason. It may take a long time for your computer to load a program or even go to the desktop. Another symptom showing that your computer has got infected by this Trojan horse is a burst of pop-up ads on your computer screen or the web pages you are viewing. Even though you attempt to stop the ads by using a pop-up blocker, those annoying ads still keep appearing on your computer.

Commonly, when you notice the symptoms above, you would run your antivirus program to scan the whole system, in order to check whether your computer has been infected or not. So, how does Trojan.ADH.2 infect your computer? How does it work? Is it necessary to remove it from your computer? How can you get rid of it? What actions should you take to prevent this Trojan horse infection? The following are the answers to these questions.

How Does the Trojan Horse Work?

Trojan.ADH.2 consists of two parts: a client part and a server part. When this Trojan horse gets installed on your computer via the means we have stated above, the hackers will use its client part to connect to the server module. Then, the client part of the Trojan horse starts receiving commands from the remote hackers and attempts to perform various harmful activities. It first modifies the registry entries in order to ensure an auto-starting whenever the computer starts up. Once a Trojan horse is activated, it can access files, folders, or your entire system. Generally, the remote hackers need to know your IP address to connect to their own machines and further control your computer. This Trojan horse will send your IP address to the hackers using the network connections on your computer, such as email, ICR or ICQ. It even furtively creates a backdoor in your system, which allows the remote hackers to gain the unauthorized access to your infected computer. In order to evade detection and removal, Trojan.ADH.2 will try to hide itself deep in your computer system. It frequently changes its file names and file paths, and it even attaches to your system files. So, most of time, it is hard for antivirus programs to delete this Trojan horse completely.

Is It Necessary to Remove the Trojan Horse?

Yes, it is necessary. Once this Trojan horse is activated in your computer, it will start performing its payloads and thus cause various problems. The Trojan horse may cause problems as follows:

PC Performance Degradation: The Trojan horse consumes large amount of CPU memory and disk space, which causes the computer to run slowly and sluggishly.

Weakened Security Level: Trojan.ADH.2 may disable the security tools installed on your computer and modify your system security settings, so that it can easily download other malware onto your PC.

System Malfunction: The Trojan horse may randomly delete or overwrite system files, corrupt Windows registry and disable important programs, leading to various system problems and causing it almost unusable.

Identity Theft and Data Loss: This Trojan horse has the capability of collecting your confidential information (such as online banking account details) as well as some valuable data and sending it to the rogue hackers via email or other transmission devices.

How Can You Get Rid of Trojan.ADH.2?

It can be seen from above that it is necessary for users to remove the vicious Trojan horse timely. To remove it, you have to clear all its traces in your computer, including its files and registry entries. You can remove those malicious files and registry entries either with the manual method or the automatic method. In the following, we will give the details steps of the two methods.

Method 1: Manually Remove the Trojan Horse.

Method 2: Automatically Remove the Trojan Horse Using Malwarebytes.

Important Note: The manual removal offered below requires users to acquire certain level of computer knowledge and skills. If you are not experienced in computer, then it is a better choice for you to use an automatic removal tool to get rid of the threat from your infected system.

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Method 1: Manually Remove the Trojan Horse.

Step 1: Restart your PC. Keep pressing the F8 key before the Windows launches. When the “Advanced Boot Options” appears on the screen, highlight “Safe Mode with Networking” option by moving the up and down arrow keys and press Enter.
Step 2: Access Windows Task Manager by pressing Ctrl+ Alt+ Delete. Under the “Processes” tab, find out and kill the processes related to Trojan.ADH.2 by clicking on the “End Process” button (Note that the malicious processes usually take up weird high CPU usage and have a random name containing a sequence of numbers and letters).

Step 3: Click the Window’s Start menu, type “folder options” into the search bar, and click the “Folder Options” program from the result list. Under the “View” tab, tick “Show hidden files, folders, and drives”, non-tick “Hide protected operating system files (Recommended)”, and click the OK button. This will show all hidden files.

Step 4: Find out and delete all files related to Trojan.ADH.2. Commonly, those malicious files are hidden by the Trojan horse in the following locations:

C:\ Program Files\
Note: You should only remove the malicious files, or else you may bring potential damage to your computer system.

Step 5: Click Windows menu, type “regedit” into the box, and click the “regedit” program from the result list. This will open the Window Registry Editor. Then, please search for the registry entries related to the Trojan horse and delete them from your computer.

HKEY_CURRENT_USER\Software\[Trojan horse name]
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\[Trojan horse name]
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\Inspector %AppData%\Protector-[random].exe

Note: The Windows Registry is a collection of commands and information which Windows continually accesses while running. If any entries within this collection are missing or corrupted, the computer may not be able to perform properly. So, you should be very careful while editing the registry. If you are afraid of making any mistakes during the process, you can download a powerful removal tool to clean up the Trojan horse.

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Method 2: Automatically Remove the Trojan Horse Using Malwarebytes.

If you have no much experience of dealing with processes, files and registry entries, then you can choose the automatic removal way – using a powerful removal tool to easily and completely eliminate the malicious Trojan horse from your infected computer. Malwarebytes Anti-Malware is a powerful removal tool which serves to remove many types of malware including Trojan horse, worm, rootkit, virus, spyware and adware. Follow the steps below to automatically clear all traces of Trojan.ADH.2:

Step 1: Click on the link here to download Malwarebytes Anti-Malware. Wait for some time until the mbam.exe file is completely downloaded onto your computer. Then, you will see a file as shown below in the folder where the downloaded file locates.
malwarebytes-anti-malware-setup file

Step 2: Double clicking on the setup file and click “Run” when a window popping up and asking “Do you want to run this file”. Then, the “Welcome to the Malwarebytes Anti-Malware Setup Wizard” window will be shown as below. Click “Next” to continue.

Step 3: Keep following the on-screen prompts until you finish the installation of the software. Check the box “Launch Malwarebytes Anti-Malware” and click the “Finish” button.

Step 4: Once the software is lunched, click on “Scan”, select “Threat Scan” under the “Select a Scan to Perform” and click on “Scan Now” to start the scan.
mbam-threat scan

Step 5: Be patient as the scan will take several minutes before it detect out Trojan.ADH.2 as well as other threats hiding on your PC.

Step 6: Once the scan is complete, the scan result will show and you should click “Quarantine All” and click the “Apply Actions” button.

Step 7: Then, Malwarebytes Anti-Malware will quarantine or remove all malicious items and then may require you to reboot your PC to complete the removal of the threats. After your computer reboots, please launch Malwarebytes to perform a threat scan again to make sure that your computer has been clean.

How Does Trojan.ADH.2 Infect Your PC?

As we have mentioned above, Trojan.ADH.2 is a Trojan horse used to help hackers control the infected computers. This Trojan horse usually gets installed on your computer without any permission or knowledge. Here are a few ways that this Trojan horse utilizes to attack your computer:

Hacked Websites
One of the most common ways used by the Trojan horse to infect your computer is hacked websites. You tend to download malicious codes of the Trojan horse onto your computer when you visit the websites hacked by cyber hackers. It is important to know that it is very dangerous to visit a suspicious website and click on the pop-up box or links in it.

Spam Emails
Another common way that Trojan.ADH.2 infects your computer is via spam email attachments. In most cases, the malicious attachment look like a legitimate picture file, audio file or video file; however, when you open the attachment, the malicious codes of the Trojan horse will be activated and the Trojan horse immediately starts to perform a variety of harmful activities in the system.

The Trojan horse can also infect your system through freeware or shareware which is downloaded from unreliable sources. Most freeware or shareware is not safe to downloaded and installed on your computer, since such software often containing installer of the Trojan horse. When you install the freeware or shareware, the Trojan horse can be unwittingly installed on your computer as well.

Trojan.ADH.2 can also make use of devices such as a USB flash drive to attack your computer. When you install an infected removable storage device to your computer, the Trojan horse can get installed via an infected autorun.inf file, which is used to automatically execute files or programs located in the device.

How to Prevent the Infection?

Computer security should be everyone’s concern. A simple slip up or ignoring this could lead to disastrous consequences. So, how can you prevent your computer from being attacked or infected by Trojan.ADH.2? What action can you take to avoid being a victim of the Trojan horse and other malware? Keep the tips below in your mind:

1. Install a reliable anti-malware program on your computer. A quality anti-malware program, though it cannot ensure a 100% protection against all types of malware, it can effectively block threats whose details have been known by computer experts and put into the database of the anti-malware program.

2. Always update your operating system and software installed on your PC. Malware often take advantage of known security vulnerabilities in your computer or the installed software to attack your computer.

3. Use caution when surfing on the Internet. Internet is full of fraud, malware, and many forms of computer threats. Keep alert when you receive spam emails, download freeware or shareware, browse social networking sites, and use instant messaging programs. A careless move may lead to the Trojan.ADH.2 infection and other malware infections. Here are some rules for you:

1) Don’t view spam emails, nor even click on the contained links or attachments.
2) Don’t download freeware or shareware from trustless sources; and run your anti-malware program to scan for malware before installing such software.
3) Avoid strange web sites that offers free services and software downloads.
4) Never receive and open files from an unknown people while using instant messaging application.


Trojan.ADH.2 is regarded as dangerous Trojan horse designed by hackers to destroy your computer system and steal confidential information together with data. This Trojan horse often sneaks into your system via the hacked websites, spam emails, freeware and other media. Once it gets installed on your computer, it begins to perform a series of harmful activities, which causes various computer problems and makes it malfunction. So, users need to take immediate action to remove it so as to avoid unwanted damage and loss.

Tips: The manual removal is a complicated task which should not be attempted by novice users. If you are not expert at computer operation, we highly recommend you to use the automatic method, for it is much easier, safer and more effective. Please download Malwarebytes to scan your whole system and clean up all potential threats on your computer now.

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