How to Remove Trojan.Agent.QB From Your System

If Trojan.Agent.QB shows up on a Windows machine, I would not treat it as harmless clutter just because it looks like an ordinary file or app. The useful signal is that it appeared at all. Trojan-style malware often hides behind normal-looking names, then lets the visible piece distract from whatever is running behind it.

A bundled installer or unofficial download is enough for that to happen. Once it gets in, the machine can start acting off: background processes may drain resources while Registry changes or scheduled tasks help pieces come back after a simple uninstall. Pop-ups are another bad sign, especially when they push you toward scam pages or more downloads instead of giving a real system message. Depending on who is behind it, Trojan.Agent.QB may also be there to collect private data.

I would slow down here and look for leftovers like UDisplay.exe or Trojan:Win64/Rootkit!MTB, not just remove the obvious entry. The guide below walks through finding Trojan.Agent.QB on Windows and cleaning out the hidden pieces carefully.

Trojan.Agent.QB Removal Guide

The quick section below is meant to catch the most visible traces of Trojan.Agent.QB first. It checks recent downloads, installed apps, and likely installation folders. If those steps do not stop the problem, continue with the complete manual cleanup.

Quick Manual Removal for Trojan.Agent.QB – Try This First

15 mins

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1.1
First, go to your downloads folder (This PC > Downloads), sort the items there by date, and see if any suspicious files have been downloaded recently. Found anything fishy? Delete it before continuing.
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Next, go to the Start Menu, navigate to Settings (the gear icon), and then to Apps.
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You’ll see all installed programs listed on that page – sort them by installation date and look for Trojan.Agent.QB or anything else that looks suspicious, unfamiliar, or unwanted.
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If you find Trojan.Agent.QB or another sketchy app, select it and start the uninstallation process. Be careful when following the uninstallation prompts so that you don’t let anything linked to the program remain on your PC.
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Afterward, look for the installation directory. You’ll often find it at C:\UserNames\UserName\AppData\Local\Programs\, but it might also be elsewhere.
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If you find the malware folder, remove it together with any leftover files that might still be in it.

When the first pass is done, reboot and observe the system. Returning symptoms mean something deeper is still present, so continue with the full guide rather than assuming the whole removal must be restarted.

SUMMARY:

Name	Trojan.Agent.QB
Type	Trojan
Detection Tool	Some threats reinstall themselves if you don’t delete their core files. We recommend downloading SpyHunter to remove harmful programs for you. This may save you hours and ensure you don’t harm your system by deleting the wrong files. Download SpyHunter (Free Remover)* OFFER *Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

How to Fully Get Rid of Trojan.Agent.QB

The recommended first step in the full guide is an optional SpyHunter 5 scan, because it may identify concealed Trojan.Agent.QB components automatically. If it clears the infection, you can avoid several of the more complex manual steps below.

Fastest Removal Option: Use SpyHunter 5

15 mins

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1.1
Click here to download and install the anti-malware tool on your PC.
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Start SpyHunter 5, click the Buy button and choose between starting your 7-days free trial or directly purchasing the tool.

If you choose to buy SpyHunter 5 now, you can use our discount code, “HTRG15“, for 15% off.
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1.3
Once you activate SpyHunter, click Start Scan Now, select the Full Scan option, and let the tool do its job.
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Once the scan completes (it could take a while, so have patience), you’ll see all malware and other undesirables listed.

Click Next to review the detections and then click Next again to delete all rogue items.

Preparatory Steps for Removing Trojan.Agent.QB

Before you hunt for Trojan.Agent.QB files, adjust Windows so hidden items are visible and prepare a way to delete locked folders. These two setup actions reduce the chance of missing concealed data or being stopped by an active malicious process.

1. Preparing for the Trojan.Agent.QB Removal

15 mins

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1.1
The first preparatory step you must perform is to enable the visibility of hidden files and folders.
Do this by searching for Folder Options in the Start Menu and selecting the View tab. Then activate “Show hidden files and folders” and save the change by clicking Apply and then OK.
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Next, you’ll need to download and install a free utility called LockHunter It’s crucial because it lets you delete files locked by malicious processes.

The guide remains usable without extra tools, but some malware folders will not delete while Windows considers them active. A locked-file utility gives you a controlled way to remove those folders when standard deletion fails.

LockHunter is free and does not require an account, so installing it should be quick. Keep it ready for the file-removal sections where locked folders are most likely to appear.

Remove Trojan.Agent.QB Processes From the Task Manager

Use Task Manager to identify processes that could be connected to Trojan.Agent.QB. Because malware names vary, treat the name as only one clue. Also check CPU, memory, file location, publisher, and whether the process fits your installed software.

2. How to Delete Trojan.Agent.QB Processes in the Task Manager

15 mins

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2.1
This is done through the Task Manager which you can open by pressing Ctrl + Shift + Esc.
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If it shows a simplified view, click More Details to expand it and see all running processes.
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Sort the list of processes by how much Memory or CPU they are using. Then look out for any that are using unusually large amounts of either resource type and yet don’t seem related to any legitimate programs that you have on your PC.

Note: Don’t expect to find a rogue process named “Trojan.Agent.QB“. Most forms of malware will hide their processes under innocent-looking names.
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For each dubious process, right-click it and select Open file location. This will lead you to a folder where the data used by this process is stored.
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You must delete that entire folder, but you’ll likely get an error when you attempt to do that because some of the files there are in use by the malware. The workaround is to use LockHunter: right-click the folder, select “What’s locking this folder?” from the context menu, and click Delete in the next window.
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After removing the files, go back to Task Manager, write down the name of the rogue process (you’ll need it later), then click it, and click the End Task button to quit it.

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Delete Trojan.Agent.QB Virus Files

This part removes file leftovers that Trojan.Agent.QB may use for startup or recovery. Check every listed folder carefully, since helper components can be placed in several Windows locations rather than beside the main executable.

3. How to Get Rid of Trojan.Agent.QB Files

15 mins

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3.1
Start by examining the Startup folders at:
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup
C:\Users\*Your Username*\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
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Search them for suspicious files, but if you aren’t what files are rogue, just delete everything in those folders except for the desktop.ini file, which is a standard system file.
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Next, inspect the Program Files and Program Files (x86) in your C: drive. Some malware apps will create folders there, so look for anything that looks linked to Trojan.Agent.QB or that is otherwise unrecognized or out-of-place folders. Delete anything suspicious you may find.
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Three other locations you must check are:
C:\Users\%user%\AppData\Local\
C:\Users\%user%\AppData\Local\Programs\
C:\Users\%user%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\
Again, if you notice anything fishy in them, it must be deleted. And if there’s a folder you aren’t sure about, it’s probably best to get rid of it. At worst, it will be something harmless linked to a legitimate program in your system. However, if you didn’t recognize its name right away, chances are it’s something you either don’t need or something that’s outright unwanted (like Trojan.Agent.QB).
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Finally, remember to clear the Temp folder. It’s located at C:\Users\YourUsername\AppData\Local\Temp.
It stores only temporary files, which are all okay to delete. So, to save yourself some time spent looking for malware files, just Ctrl + A to select everything, and then press Delete from your keyboard to delete all of the folder’s contents.

Get Rid of Trojan.Agent.QB Scheduled Tasks

A scheduled task can quietly restart Trojan.Agent.QB after you delete other files. Open Task Scheduler, review the task actions, and remove entries that launch unknown programs from suspicious directories.

4. Eliminate Trojan.Agent.QB Scheduled Tasks

15 mins

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4.1
Open the Task Scheduler by searching for it in the Start Menu search bar. Then, one by one, review the scheduled tasks in the Task Scheduler Library.
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For each task, double-click it and open the Actions tab, where you can learn what it is that the task is set to perform. Look for tasks that run unfamiliar executables, scripts, or anything located in the AppData or Roaming directories.
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If you come across a task that executes anything suspicious, write down its file path, then right-click the task, and select Delete.
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After that, go to the file path you saved and delete the file that the task was set to run.

Uninstall the Trojan.Agent.QB Malware App Through the Windows Registry

The registry may contain values that help Trojan.Agent.QB load with Windows or enforce unwanted changes. Only delete entries you can clearly connect to suspicious files. If you are unsure, use SpyHunter 5 for this stage.

5. Remove Trojan.Agent.QB Through the Registry

15 mins

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5.1
Type “regedit” in the Start Menu and hit Enter to go to the Registry Editor.
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5.2
Then click Edit > Find to open the search box and then type the exact name of whatever program you tried to uninstall during the quick steps at the start of the guide.
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Click Find Next and if a result comes up, click the registry key (folder) in the left panel that contains it and delete that key. Perform another search after each deleted key until there are no more results for that search query.
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Next, search for the name of any other programs you attempted to delete. Also search for the names of processes you ended in the Task Manager earlier in the guide.
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After you’ve deleted all relevant entries, manually navigate to these registry keys:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce\Setup
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
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Select each of these keys to reveal their contents in the right panel. Then look for values referencing Trojan.Agent.QB or any unknown applications. Delete only the specific values linked to the malware and leave the keys that contain them intact.