Anti-Cheat Explained — Kernel Drivers, False Positives and Performance
Kernel-level anti-cheat is why some games conflict with your software. Here's what it does, what it costs, and how to troubleshoot it.
The short answer
Kernel-level anti-cheat runs with the highest system privileges so it can detect cheats that operate below the game, which is effective but means it can conflict with other software operating at the same level such as virtualisation tools, overlays and some monitoring utilities. Most anti-cheat launch failures are caused by conflicting software rather than by the anti-cheat itself being broken.
Verified and last updated August 12, 2026.
- Time needed
- 12 min
- Difficulty
- Intermediate
- Read time
- 3 min
Anti-cheat is the software most players interact with daily and understand least, which is unfortunate because it is also a frequent cause of games not launching.
Why it runs at kernel level
Cheats operate below the game — reading memory, injecting into processes, manipulating drivers. Anti-cheat running at the same level as the game cannot see them. So it runs deeper, with the highest system privileges, which is why it is both effective and occasionally disruptive.
The two types
Server-side detection is the one nobody complains about because it is invisible — it analyses whether your aim behaves like a human. It is also increasingly the most effective layer.
Why it stops your game launching
Not because the anti-cheat is broken. Because something else on your system behaves in a way it cannot distinguish from a cheat.
Troubleshooting a launch failure
Close everything non-essential and retry 5 min
Overlays, monitoring tools, RGB software, macro utilities, capture software. If it launches, add them back one at a time.
Check for virtualisation features 10 min
Some anti-cheat systems refuse to run alongside certain virtualisation configurations. This is a common cause on machines used for development or with Windows security features enabled.
Repair the anti-cheat installation 10 min
Most systems ship a repair tool in the game's install directory, often in an anti-cheat subfolder. It reinstalls the service and driver and fixes a good share of failures.
Add exclusions in your antivirus 10 min
For both the game directory and the anti-cheat service. Third-party antivirus blocking the anti-cheat driver is a recurring cause.
Verify game files 15 min
A partial anti-cheat install after an interrupted update behaves unpredictably.
The security question, honestly
Kernel-level software has the highest privileges on your machine, and a vulnerability in it is correspondingly serious. That concern is legitimate and not paranoia.
In practice, the major systems are maintained by large companies with strong commercial incentives to avoid an incident, and significant problems have been rare.
The reasonable position: know what you have installed, uninstall it for games you no longer play, and be aware that it is often installed separately from the game so removing the game does not always remove it.
What works
What doesn't
Key takeaways
Frequently asked questions
Is kernel-level anti-cheat a security risk?
It is a legitimate concern rather than paranoia, because software running at kernel level has the highest privileges on your machine and a vulnerability in it is correspondingly serious. In practice the major systems are maintained by large companies with strong incentives to avoid that, and there have been very few significant incidents. The reasonable position is to be aware of what you are installing rather than to refuse all of it.
Why does anti-cheat fail to launch?
Almost always a conflict with other software operating at the same privilege level — virtualisation features, certain monitoring and overlay tools, memory-reading utilities, and occasionally aggressive antivirus. The anti-cheat cannot distinguish these from cheats by behaviour alone, so it refuses to start. Closing that software before launching resolves most cases.
Does anti-cheat hurt performance?
Slightly, and less than commonly claimed. It performs continuous scanning and integrity checking which consumes a small amount of CPU, typically low single-digit percentages. Where it appears to cost more is when it conflicts with something else and causes stutter, which is a conflict symptom rather than the overhead itself.
Can it ban me for something innocent?
It can flag software that behaves like a cheat without being one, which is the main source of genuine false positives. Memory-reading overlays, hardware macro utilities and some system tools all inject into processes in ways that resemble cheating. If you run anything obscure that hooks into games, that is where to look first if you receive an unexpected action.
Should I uninstall anti-cheat when I stop playing a game?
It is reasonable to, and it is often installed separately from the game so uninstalling the game does not always remove it. Check the installed programs list for anti-cheat entries from games you no longer play. There is no benefit to leaving kernel-level software installed for a game you have finished with.
About the author
PC Hardware & Performance Editor
Marcus has been building, breaking and repairing gaming PCs since 2011, first as a weekend favour for friends and then for eight years as a bench technician at an independent repair shop in Portland, where roughly a third of the job was diagnosing machines that "ran fine yesterday".
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