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System Process High CPU Usage Windows 11 Fix [2026]

AG
Againly Tech Team
April 23, 2026

System Process High CPU Usage Windows 11 Fix [2026]

Quick Answer: System process high CPU due to driver conflict or Windows service. Update all drivers and disable Superfetch.

Fix

Update Drivers

Device Manager → Update all drivers

Disable SysMain

Stop-Service SysMain
Set-Service SysMain -StartupType Disabled

Run SFC

sfc /scannow

Check for Interrupts

High interrupts indicate hardware/driver issue

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CPU Usage High at Idle Windows 11 Fix [2026]Fix high CPU usage when computer is idle. Check for malware, disable startup apps, and identify runaway processes.GPU Usage 100% at Idle Windows 11 Fix [2026]Fix GPU usage stuck at 100% when idle. Check for crypto miners, update GPU drivers, and scan for malware.Service Host High CPU Usage Windows 11 Fix [2026]Fix Service Host processes using high CPU. Identify specific service, disable unnecessary services, and restart Windows.
System Process High CPU Usage Windows 11 Fix [2026] | Againly