UnrealCEFSubprocess is a file associated with the UnrealCEFSubprocess process. In some cases, however, it may be considered unsafe or malicious, especially if it is located in certain folders (such as the C:\Windows or C:\Windows\System32 folder) or if it is masquerading as the legitimate UnrealCEFSubProcess file. To remove UnrealCEFSubprocess from your computer, you can follow the general steps explained in the guide section of this post. It’s important to note, though, that the specific steps may vary depending on your operating system version and the file’s location. If you’re unsure or uncomfortable performing the removal manually, it is recommended to use reputable antivirus or anti-malware software to scan and remove any potentially harmful files or processes from your computer.

The UnrealCEFSubprocess process in Task Manager
How to stop UnrealCEFSubprocess ?

To stop the UnrealCEFSubprocess process from running on your computer, you can follow these steps:

1. Open the Task Manager by pressing Ctrl + Shift + Esc or by right-clicking on the taskbar and selecting “Task Manager”.
2. In the Task Manager window, go to the “Processes” or “Details” tab (the name may vary depending on your operating system).
3. Look for the UnrealCEFSubprocess or UnrealCEFSubProcess.exe process in the list of running processes.
4. Right-click on the UnrealCEFSubprocess process and select “End Task” or “End Process” to terminate it.
5. If prompted, confirm the action to end the process.

By stopping the UnrealCEFSubprocess process, you prevent it from running and utilizing system resources. Keep in mind that some applications or programs may require the UnrealCEFSubprocess to function properly.

What is UnrealCEFSubprocess?

UnrealCEFSubprocess is an adware-based software that functions by promoting goods and services through various types of online advertisements. Once your system is infected with this ad-generating software, your browser, including popular ones like Internet Explorer, Chrome, and Firefox, will display a large number of ads, including banners, pop-ups, and boxes. While UnrealCEFSubprocess is not a virus, it can sometimes impact system performance, particularly on machines with limited resources. The extensive generation of ads may slow down the computer. Another potential inconvenience is when the adware displays an excessive number of ads, which can cover your browser window and prevent you from loading pages. Although this does not pose direct harm to you or your PC, it can be frustrating.

Unreal Cef SubProcess

To uninstall Unreal CEF SubProcess, you can find instructions at the bottom of this page. These instructions are designed to help you remove this annoying program from your system. Additionally, here are some tips to help you avoid similar irritating programs in the future:
1. Avoid installing programs using the Easy/Quick/Automatic/Default installation options. These options may include the installation of ad-generating plugins.
2. Stay away from shady websites. Be cautious when visiting unfamiliar pages, interacting with pop-ups, opening spam emails, or downloading torrents.
3. Strengthen your defenses against more serious threats by purchasing a reliable anti-malware tool. This tool can also provide protection against ad-displaying programs.
By following these tips and using proper security measures, you can minimize the risk of encountering Unreal CEF SubProcess adware and other unwanted programs in the future.

Unreal Cef SubProcess
The Unreal Cef SubProcess will use most of your OS recourses

UnrealCEFSubprocess Valorant

UnrealCEFSubprocess Valorant is a legitimate process that is associated with the popular online game Valorant. However, it’s important to be cautious as executable file names can be manipulated by malware to appear as legitimate processes. If you have any concerns about the UnrealCEFSubProcess.exe file on your system, it is recommended to verify its authenticity. You can do this by checking its location, which is typically within the Unreal Engine installation directory. Additionally, scanning the file with reputable antivirus software can help ensure that it is not a malicious file posing as UnrealCEFSubprocess Valorant. Taking these precautions will help you ensure the integrity and security of your system.


Danger LevelMedium (nowhere near threats like Ransomware, but still a security risk)
SymptomsProduction of various ads and a possible slowdown of the PC.
Distribution MethodProgram bundles, drive-by downloads, fake pop-ups, torrents, spam, contaminated websites.
Detection Tool

How to remove UnrealCEFSubprocess

To try and remove UnrealCEFSubprocess quickly you can try this:

  1. Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
  2. Then click on the Extensions tab.
  3. Look for the UnrealCEFSubprocess extension (as well as any other unfamiliar ones).
  4. Remove UnrealCEFSubprocess by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of UnrealCEFSubprocess and any other suspicious items.

If this does not work as described please follow our more detailed UnrealCEFSubprocess removal guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide.

Some of the steps may require you to exit the page. Bookmark it for later reference.
Next, Reboot in Safe Mode (use this guide if you don’t know how to do it).

Step1 Uninstall the UnrealCEFSubprocess app and kill its processes

The first thing you must try to do is look for any sketchy installs on your computer and uninstall anything you think may come from UnrealCEFSubprocess. After that, you’ll also need to get rid of any processes that may be related to the unwanted app by searching for them in the Task Manager.

Note that sometimes an app, especially a rogue one, may ask you to install something else or keep some of its data (such as settings files) on your PC – never agree to that when trying to delete a potentially rogue software. You need to make sure that everything is removed from your PC to get rid of the malware. Also, if you aren’t allowed to go through with the uninstallation, proceed with the guide, and try again after you’ve completed everything else.

  • Uninstalling the rogue app
  • Killing any rogue processes

Type Apps & Features in the Start Menu, open the first result, sort the list of apps by date, and look for suspicious recently installed entries.

Click on anything you think could be linked to UnrealCEFSubprocess, then select uninstall, and follow the prompts to delete the app.

delete suspicious apps

Press Ctrl + Shift + Esc, click More Details (if it’s not already clicked), and look for suspicious entries that may be linked to UnrealCEFSubprocess.

If you come across a questionable process, right-click it, click Open File Location, scan the files with the free online malware scanner shown below, and then delete anything that gets flagged as a threat.

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
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    Delete UnrealCEFSubprocess files and quit its processes.

    After that, if the rogue process is still visible in the Task Manager, right-click it again and select End Process.

    Step2 Undo UnrealCEFSubprocess changes made to different system settings

    It’s possible that UnrealCEFSubprocess has affected various parts of your system, making changes to their settings. This can enable the malware to stay on the computer or automatically reinstall itself after you’ve seemingly deleted it. Therefore, you need to check the following elements by going to the Start Menu, searching for specific system elements that may have been affected, and pressing Enter to open them and see if anything has been changed there without your approval. Then you must undo any unwanted changes made to these settings in the way shown below:

    • DNS
    • Hosts
    • Startup
    • Task
    • Services
    • Registry

    Type in Start Menu: View network connections

    Right-click on your primary network, go to Properties, and do this:

    Undo DNS changes made by UnrealCEFSubprocess

    Type in Start Menu: C:\Windows\System32\drivers\etc\hosts

    Delete UnrealCEFSubprocess IPs from Hosts

    Type in the Start Menu: Startup apps

    Disable UnrealCEFSubprocess startup apps

    Type in the Start Menu: Task Scheduler

    Delete UnrealCEFSubprocess scheduled tasks

    Type in the Start Menu: Services

    Disable UnrealCEFSubprocess services

    Type in the Start Menu: Registry Editor

    Press Ctrl + F to open the search window

    Clear the Registry from UnrealCEFSubprocess items

    Step3 Remove UnrealCEFSubprocess from your browsers

    • Delete UnrealCEFSubprocess from Chrome
    • Delete UnrealCEFSubprocess from Firefox
    • Delete UnrealCEFSubprocess from Edge
    1. Go to the Chrome menu > More tools > Extensions, and toggle off and Remove any unwanted extensions.
    2. Next, in the Chrome Menu, go to Settings > Privacy and security > Clear browsing data > Advanced. Tick everything except Passwords and click OK.
    3. Go to Privacy & Security > Site Settings > Notifications and delete any suspicious sites that are allowed to send you notifications. Do the same in Site Settings > Pop-ups and redirects.
    4. Go to Appearance and if there’s a suspicious URL in the Custom web address field, delete it.
    1. Firefox menu, go to Add-ons and themes > Extensions, toggle off any questionable extensions, click their three-dots menu, and click Remove.
    2. Open Settings from the Firefox menu, go to Privacy & Security > Clear Data, and click Clear.
    3. Scroll down to Permissions, click Settings on each permission, and delete from it any questionable sites.
    4. Go to the Home tab, see if there’s a suspicious URL in the Homepage and new windows field, and delete it.
    1. Open the browser menu, go to Extensions, click Manage Extensions, and Disable and Remove any rogue items.
    2. From the browser menu, click Settings > Privacy, searches, and services > Choose what to clear, check all boxes except Passwords, and click Clear now.
    3. Go to the Cookies and site permissions tab, check each type of permission for permitted rogue sites, and delete them.
    4. Open the Start, home, and new tabs section, and if there’s a rogue URL under Home button, delete it.

    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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