Share this article
Improve this guide
UnrealCEFSubProcess: What Is It & How to Fix its High CPU
Solutions to reduce CPU usage and boost performance
4 min. read
Updated onOctober 4, 2023
updated onOctober 4, 2023
Share this article
Improve this guide
Read our disclosure page to find out how can you help Windows Report sustain the editorial teamRead more
Key notes
High CPU usageis a problem in Windows we have all faced at some point, but in most cases, it’s a temporary issue, and things are fixed automatically within a short period. But with processes likeUnrealCEFSubProcess, the problem persists unless concrete action is taken.
Many users have reportedUnrealCEFSubProcess100% CPU usage with Valorant. You will find forums flooding with queries about whether UnrealCEFSubProcess is a virus. Let’s find out all about it and the solutions that worked for others!
What is Unreal CEF SubProcess?
For those wondering is UnrealCEFSubProcess important, it’s a legit Riot Games launcher process often linked to Valorant and is responsible for a range of gaming-related tasks. You may often find multiple such processes running in theTask Manager.
And for some users,UnrealCEFSubProcessis not closing, or as soon as it does, another one appears automatically. Here are a few reasons for the high CPU usage:
How do I fix UnrealCEFSubProcess high CPU usage?
Before we head to the slightly complex solutions, here are a few quick ones to try:
If none work, move to the fixes listed next.
1. Add UnrealCEFSubProcess as an exclusion in the antivirus
Adding theUnrealCEFSubProcess.exeprocess as an exception to the antivirus should get things up and running when it leads to high CPU usage. Remember, the steps listed here are for Windows Security, and if you are using another antivirus, check the manufacturer’s website for the process.
2. Uninstall the antivirus
In many cases, it was an antivirus that triggered theUnrealCEFSubProcesshigh CPU usage, anduninstalling the programdid the trick. The AVG antivirus was reported as the underlying cause by many, but other antivirus, too, can be the underlying cause.
3. Reinstall the game
When nothing else works, it could be a problem with the game installation to blame, and reinstalling it will get things up and running.
After you have fixed the error, check some quick tips tooptimize the PC for gamingand tricks toboost the Windows performance.
Tell us which fix worked for you in the comments section below.
More about the topics:High CPU usage,Valorant
Kazim Ali Alvi
Windows Hardware Expert
Kazim has always been fond of technology, be it scrolling through the settings on his iPhone, Android device, or Windows PC. He’s specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
Long-time Windows user, Kazim is ready to provide a solution for your every software & hardware error on Windows 11, Windows 10 and any previous iteration. He’s also one of our experts in Networking & Security.
User forum
0 messages
Sort by:LatestOldestMost Votes
Comment*
Name*
Email*
Commenting as.Not you?
Save information for future comments
Comment
Δ
Kazim Ali Alvi
Windows Hardware Expert
Kazim is specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
