A program or file that has been proven to pose an extra threat to the computer is assigned the detection name BAT/TrojanDownloader.Agent.PBO. This kind of threat is typically used to download further malware onto the computer or install potentially unwanted apps. The system is often disturbed in a medium-to-severe way by BAT/TrojanDownloader.Agent.PBO. It modifies some settings without requesting the user’s consent.

Image of BAT/TrojanDownloader.Agent.PBO

How does it infect the computer?

Any variations of this threat, including BAT/TrojanDownloader.Agent.PBO, are often disseminated by malicious applications. Drive-by-download scripts on compromised websites can potentially cause malware infections and significant computer harm.

Additional methods of spreading BAT/TrojanDownloader.Agent.PBO include file-sharing networks, malicious links from social networking websites, and spam email campaigns. Because they were repacked to incorporate this threat into the installation process, be wary of key generators and cracked programs.

How does this malware operate?

You should expect an abrupt reduction in the speed of your computer and Internet connection if BAT/TrojanDownloader.Agent.PBO manages to infiltrate it. The threat downloads harmful files by repeatedly establishing a connection with a predetermined host. Additionally, the Internet browser, security configuration, and configuration settings will all be changed. Malware called BAT/TrojanDownloader.Agent.PBO may terminate antivirus and firewall processes.


When BAT/TrojanDownloader.Agent.PBO infects your computer, you can notice a few distinct symptoms. At first, you may notice an abrupt drop in system performance since BAT/TrojanDownloader.Agent.PBO often uses system resources to accomplish its nefarious operations in the background. Unexpected system freezes or crashes might happen, interfering with your regular operations. Furthermore, BAT/TrojanDownloader.Agent.PBO is infamous for permitting illegal access to your computer, which raises the possibility of identity theft or data breaches. Unauthorized file modifications, the establishment of new user accounts, or strange network activity might all be signs of a security breach.

In addition, BAT/TrojanDownloader.Agent.PBO often acts invisibly, making it challenging to identify their existence. Unusual activity might include the display of unknown icons or the alteration of system settings without your permission. It’s critical to keep an eye out for any strange symptoms and to update your antivirus program on a regular basis in order to help prevent, detect, and eliminate BAT/TrojanDownloader.Agent.PBO infestations before they seriously damage your computer and jeopardize your sensitive data.

BAT/TrojanDownloader.Agent.PBO is also detected as:
Avast Win32:Trojan-gen
Avira TR/Crypt.ULPM.Gen
BitDefender Dropped:Trojan.Agent.UG
DrWeb Trojan.DownLoader.11644
ESET-NOD32 Win32/TrojanDownloader.Agent.APD
F-Secure Trojan-Downloader:W32/Agent
Fortinet W32/TrojanDownloader.AGENT.APD!tr
Kaspersky Trojan-Downloader.Win32.Agent.apd
Malwarebytes Generic.Malware.AI.DDS
Sophos Mal/Behav-009
TrendMicro TROJ_GEN.R002C0CJC23

For more help

There are other variants of this threat in the same family, such as BAT/TrojanDownloader.Agent.PBO. Please refer to the Trojan Script topic for details on relevant eradication methods and dangers.

How to remove BAT/TrojanDownloader.Agent.PBO?

To totally remove BAT/TrojanDownloader.Agent.PBO from the computer and get rid of relevant viruses and trojans, please execute the procedures as stated on this page. Make sure that you have completely scanned the system with the suggested malware removal tools and virus scanners.

Quick Fix - Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted PC security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of hazardous viruses like BAT/TrojanDownloader.Agent.PBO through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

CC for Windows Installation

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the signature file, please wait for this process to complete.

6. To begin checking for threats like BAT/TrojanDownloader.Agent.PBO, click on the Start Scan button. Wait for this scan to finish.

CC for Windows Start Scan

7. At the end of the scan process, click on Remove all threats to delete the BAT/TrojanDownloader.Agent.PBO virus, including all malicious objects from the computer.

Free features of Combo Cleaner for Windows include Disk Cleaner, Big Files finder, Duplicate files finder, and Uninstaller. To use antivirus, privacy scanner, and to delete identified threats, users have to upgrade to a premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the virus and malicious items linked to it.

Step 1 : Start Windows in Safe Mode With Networking

Windows 10 / 11 Guide

1. Click on the Windows logo and select the Power icon when options pop up.
2. Select Restart from the options while pressing the Shift key on the keyboard.
3. Choose an Option window will appear. Select the Troubleshoot button.
4. In next window, please choose the Advanced Option.
5. On the Advanced Option window, click on Startup Settings, and then, click the Restart button to reboot the computer.
6. When Windows boots in Startup Settings, press the function key F5 or number 5 on the keyboard.

A simpler alternative for Windows 10 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Windows 8 Guide

1. Click the Windows Start icon in the lower left section of the screen.
2. Open the Search window and type Advanced in the field. It will open General PC Settings.
3. Click on Advanced Startup, and then click on the Restart Now button.
4. Once the computer starts in the Advanced Startup option menu, select Troubleshoot.
5. Next, click on Advanced Options to reveal the next section.
6. Click Startup settings, and then click the Restart button to boot the PC in Startup Settings.
7. Use function key F5 or number key 5 to Enable Safe Mode with Networking.

Step 2 : Run a virus scanner

To remove BAT/TrojanDownloader.Agent.PBO, we suggest that you scan the infected computer with this powerful virus removal tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against BAT/TrojanDownloader.Agent.PBO or similar attacks, you can activate Sophos to have real-time scanning and complete defense against all forms of threats.

1. Download Sophos Virus Removal Tool from the link below. Save the file on your computer where you can easily access it.

2. Once the download completes, browse the location of the file. Double-click to run the program and begin the install process.

3. On the first window of installation wizard, click Next to continue. Then, it will display the program’s License Agreement. You need to Accept the terms in order to proceed. If Windows prompts for User Account Control, please click Yes to proceed.

Screenshot of Sophos EULA Page

4. On succeeding windows, click Next or Continue to carry on with the installation. After completing the installation process, Launch Sophos Virus Removal Tool.

5. An internet connection is required when running this scanner in order to download important updates. Make sure that everything is up-to-date to effectively remove viruses like BAT/TrojanDownloader.Agent.PBO.

6. Click the Start Scanning button to  carry out the Scan. This will check the system for the presence of malicious objects, malware, and viruses. The tool reveals items that were found linked to BAT/TrojanDownloader.Agent.PBO and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, BAT/TrojanDownloader.Agent.PBO should have been completely removed from the computer. If there are still signs of infection or the computer is displaying unusual behaviors, please continue with the remaining procedures.

Step 3 : Double Check with Windows Security Apps

Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with BAT/TrojanDownloader.Agent.PBO. For Windows 8 and 10/11 users, please run Windows Security. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove the BAT/TrojanDownloader.Agent.PBO virus.

Windows 8 / 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove BAT/TrojanDownloader.Agent.PBO, viruses, and other malicious items from Windows 8 or Windows 10/11 systems. Follow these procedures to scan your computer with the tool:

1. Tap or click the Search charm, search for Windows Security, and then open the application.

Image of Windows Security Search

2. On the Home tab, click Virus and threat protection from the sidebar.

3. On the main window, click on Scan Options. Then, click on Full Scan button.

Image of Scan Options

4. Lastly, click on the Scan now button to start scanning for the presence of BAT/TrojanDownloader.Agent.PBO. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to BAT/TrojanDownloader.Agent.PBO or not. You may now restart Windows to complete the virus removal process.

How to protect the computer from BAT/TrojanDownloader.Agent.PBO?

The initial defense that comes to mind for any computer user is to install an anti-virus or anti-malware program. This move is sensible and probably the most practical way to protect the computer against a BAT/TrojanDownloader.Agent.PBO attack. Hence, keep in mind that having security software does not guarantee full protection. The majority of the prevention still lies in being cautious of users, and therefore, we are providing the following information as guidelines to protect the computer from virus infection.

Avoid Malicious Websites

There are enormous numbers of websites that were made for the primary purpose of spreading BAT/TrojanDownloader.Agent.PBO. Normally, these sites are involved in integrating malicious pop-up and browser hijacker, that will eventually cause further virus infections. Avoid such websites.

Ignore and Delete Phishing Emails

The mass-mailing of computer viruses gives the attackers the luxury of spreading their malicious code in just one send-off. This will arrive in the inbox as an email that appears to be from a legitimate organization. So, if you receive an unexpected email with a link or an attached file, better delete it immediately.

Do Not Click a Suspicious Link

Links from social media, forums, and blog sites are sometimes being utilized by attackers to drive web users to a malicious page that contains malicious code. Therefore, do not just click on any link, especially if it looks suspicious. Accidental access to the destination site may lead to a BAT/TrojanDownloader.Agent.PBO infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the BAT/TrojanDownloader.Agent.PBO virus. Avoid acquiring these types of applications, and if there is a need to download freeware or shareware, be sure to obtain it from the official website or trusted providers.

About the author

Leave a Comment

Your email address will not be published. Required fields are marked *