Early accessSee your fix plan free. Pay only when you approve an automated run.
AgainlyWindows fixes
Sign inDownload free
← Back to all guides
Performance

CPU Usage High at Idle Windows 11 Fix [2026]

AG
Againly Tech Team
April 23, 2026

CPU Usage High at Idle Windows 11 Fix [2026]

Quick Answer: High CPU at idle due to background processes or malware. Open Task Manager, sort by CPU, and end high-usage tasks.

Fix

Identify Process

Task Manager → Processes → Sort by CPU → Identify culprit

Disable Startup

Task Manager → Startup → Disable high-impact apps

Check for Malware

Run Windows Defender full scan

Update Drivers

Outdated drivers can cause high CPU usage

How Againly Helps

Againly can inspect the relevant local evidence and propose a fix plan for review.

[CTA: Try free diagnosis]

Evidence-led support

Want help diagnosing this on your PC?

Againly checks the local evidence and shows you a proposed plan before making changes.

Download Againly Free →

Diagnosis-first coverage: executable changes are offered only when this PC's evidence and available capabilities support them.

Works on Windows 10 & 11 · No credit card required

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]Fix System (ntoskrnl.exe) using high CPU. Check for driver issues, disable Superfetch, and run system file checker.
CPU Usage High at Idle Windows 11 Fix [2026] | Againly