How to Fix High CPU Usage Caused by Windows PowerShell

Windows PowerShell is a versatile built-in command-line tool for Windows that lets users execute a wide range of system commands. While useful for tasks like installing software, checking updates, and system scans, PowerShell can sometimes cause spikes in CPU usage, slowing down your PC significantly. If you encounter this issue, here’s how to diagnose and solve the problem efficiently.

1. Update Windows

Outdated system files are a common reason behind PowerShell-related CPU issues. Regularly updating Windows ensures system stability and fixes known bugs:

• Press Win + I to open Settings.

• Click Windows Update on the left sidebar.

• Select Check for Updates.

Allow Windows to download and install any available updates. Reboot if prompted and check CPU performance afterward.

2. Perform a Clean Boot to Identify Conflicting Applications

Third-party applications or services may interfere with PowerShell and elevate CPU usage. Conducting a clean boot helps identify the culprit:

• Press Win + R, type msconfig, and hit Enter.

• In the System Configuration window, choose Selective startup, and ensure only Load system services and Use original boot configuration are checked.

• Navigate to the Services tab, check Hide all Microsoft services, then click Disable all.

• Move to the Startup tab and click Open Task Manager.

• Disable all non-essential startup applications by right-clicking and selecting Disable.

• Close Task Manager, apply changes in System Configuration, and restart your PC.

After restarting, enable services individually to pinpoint the problematic application.

3. Run System File Checker (SFC) and DISM Scans

Corrupt system files might also cause PowerShell issues. Perform SFC and DISM scans to repair these files:

• Open Command Prompt as an administrator (search “CMD” in the Start menu).

• Type sfc /scannow and press Enter. Let the scan finish.

• Afterward, type dism /online /cleanup-image /restorehealth and hit Enter. Allow completion and reboot your system.

4. Scan for Viruses and Malware

Viruses or malware can increase CPU usage. Regular scans enhance your system’s security:

• Search for and open Windows Security from the Start menu.

• Click Virus & threat protection, then select Scan options.

• Choose Full scan and hit Scan now. Follow any subsequent recommendations provided after the scan.

5. Reset Your Windows Installation

A reset may solve deep-seated software conflicts affecting PowerShell:

• Press Win + I to open Settings, select System, then Recovery.

• Click Reset PC, and choose to either keep personal files or remove everything.

• Proceed through the reset steps and evaluate system performance afterward.

6. Repair Windows Using Installation Media

If other methods fail, repairing Windows via installation media is an effective solution:

• Download Windows installation ISO from Microsoft’s official website.

• Create bootable installation media on a USB drive.

• Restart your PC and boot from the USB drive.

• Choose Repair your computer and follow the on-screen instructions.

Final Thoughts

High CPU usage from PowerShell doesn’t have to disrupt your workflow. These practical steps help swiftly restore optimal performance. Regular maintenance, system scans, and updates significantly reduce the likelihood of this issue occurring again, ensuring a smoother, safer computing experience.