High CPU usage of Feature Access Manager service in Windows 11

Some PC users and gamers may experience abnormally high CPU usage when using Windows 11 or Windows 10, especially when running certain applications or games. This article provides some suggestions to help users alleviate this problem.

Some affected PC users noted that when experiencing this issue, they observed Task Manager showing other applications using only 0% to 5% of the CPU, while Service Host: Capability Access Manager service usage But it is as high as 80% to 100%.

What is the Service Host: Feature Access Manager service?

The function of the Function Access Manager service is to confirm whether the application has permission to access the camera and microphone and grant the necessary permissions. It facilitates managing UWP application access to functionality and checks whether an application can access specific functionality. If the Feature Access Manager service stops running, UWP applications will be affected and will not function properly.

Fix high CPU usage of Feature Access Manager service in Windows 11

If you find that the CPU usage of the Service Host: Feature Access Manager service is unusually high in your Windows 11/10 system, you can try the following suggestions to resolve the issue.

Disable SysMain (SuperFetch) and Functional Access Manager Service (Camsvc) services

Troubleshooting in Clean Boot State

Rollback Windows Upgrade

Let’s take a closer look and record the execution of each solution. Before proceeding with the resolution steps, make sure Windows is updated, perform a system file scan and a full system antivirus scan, then restart your computer to check if the issue has been resolved.

1] Disable SysMain (SuperFetch) and Functional Access Manager Service (Camsvc) services

To resolve this issue, you need to disable the SysMain (SuperFetch) service and the Feature Access Manager service in Windows Service Manager. However, please note that disabling these services may cause system instability, especially for other installed applications. If system instability occurs, you may need to re-enable these services and try other solutions.

To disable both of the above services on your system, follow these steps:

Press Win R to open the run prompt.

Type "Enter" and press the Enter button.

Find and double-click the Capability Access Manager service.

Select Disabled Device from the boot type drop-down list.

Click the "OK" button.

The same is true for SysMain.

Disabling Service Host: Function Access Manager service prevents system slowdown, but some functions may be affected.

Disabling SysMain will not cause major problems on the system, it will only cause slow application startup and idle RAM.

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