High CPU usage in Windows 11 usually means a process is using more CPU cycles than it should. It could be due to excessive background apps, pending Windows updates, corrupted system files, or high-resource processes like antivirus scans and indexers.

Fixes for High CPU Usage (Windows 11)

Restart Your PC: This is the quickest way to clear stuck processes and memory.

Use Task Manager: Press Ctrl + Shift + Esc, find processes with high CPU usage, right-click them, and select "End task".

Disable Startup Apps: In Task Manager, go to the "Startup apps" tab, right-click unnecessary apps, and select "Disable".

Update Windows & Drivers: Go to Settings > Windows Update to ensure you have the latest performance patches.

Check Power Settings: Search for "Choose a power plan" in the Control Panel, and select "Balanced" or "High Performance".

Scan for Malware: Run a full scan with Windows Defender, as viruses can cause high CPU usage.

Disable SysMain (Superfetch): Search for "Services," find "SysMain," right-click to stop it, which can reduce background resource usage.

Disable High Precision Event Timer: In Device Manager, find "High precision event timer" under System Devices, right-click, and disable it

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#Microsoft Acknowledges #HighCPU Utilization Bug in #Windows11 File Explorer

The bug affects Windows 11 21H2 and 22H2

Microsoft reports that the high CPU utilization bug will continue to plague the Windows 11 system until the currently logged-in user signs out or until the system is rebooted. Simply locking Windows will not resolve the bug, according to Microsoft.

https://www.tomshardware.com/news/microsoft-windows-11-file-explorer-cpu-bug