How to Fix Windows 11 Running Slow: 3 Proven Solutions That Actually Work (2026)

Introduction

Is your Windows 11 PC crawling like it's stuck in slow motion? You're not alone. Thousands of users report that their computers feel sluggish after upgrading to or installing Windows 11 — even on relatively modern hardware. Pages take forever to load, apps freeze unexpectedly, and the system sometimes becomes completely unresponsive.

The good news? In most cases, Windows 11 slow performance is fixable — and you don't need to be a tech expert to do it.

This guide walks you through the most common causes of slow performance on Windows 11 and provides three clear, step-by-step solutions that beginners can follow with confidence.

Why Is Windows 11 Running So Slow? (Common Causes)

Before jumping into the fixes, it helps to understand why the problem happens in the first place. Here are the most frequent culprits:

Too many startup programs — Every app that launches at startup eats up your CPU and RAM before you even open a single window.
High RAM usage — Windows 11 is more memory-hungry than its predecessors. Background processes and browser tabs can quietly consume several gigabytes of RAM.
Outdated or corrupted drivers — Old graphics, chipset, or network drivers can cause bottlenecks and system instability.
Bloatware and unnecessary background apps — Many Windows 11 installations come with pre-installed apps that run in the background and drain resources.
A full or fragmented hard drive — If your C: drive is nearly full (especially on older HDDs), Windows struggles to write temporary files, causing noticeable slowdowns.

Solution 1: Disable Startup Programs

Why This Works

Every program set to launch at startup competes for limited CPU and RAM from the moment you turn on your PC. Disabling unnecessary startup apps is one of the fastest and most effective ways to speed up boot time and improve overall responsiveness.

Step-by-Step Instructions
1. Press Ctrl + Shift + Esc to open Task Manager.
2. Click on the "Startup apps" tab (in the left sidebar).
3. Look through the list. You'll see each app's Startup impact rated as Low, Medium, or High.
4. Right-click on any app you don't need at startup (e.g., Spotify, Discord, OneDrive) and select "Disable".
5. Repeat for all non-essential apps marked as High impact.
6. Restart your PC and notice the difference in boot speed.
Pro Tip: Be careful not to disable antivirus software or essential system services. If you're unsure about an app, search its name online before disabling it.
Solution 2: Adjust Power Plan and Visual Effects Settings

Why This Works

By default, Windows 11 sometimes runs on a "Balanced" power plan, which throttles your CPU to save energy — at the cost of performance. Additionally, Windows 11's flashy visual animations look great but consume extra GPU and CPU resources. Disabling them gives your system more breathing room.

Step-by-Step Instructions

Part A — Change Your Power Plan:
1. Click the Start Menu and type "Power plan", then select "Choose a power plan".
2. Select "High performance" (or "Ultimate Performance" if available).
3. Click "Save changes".
Part B — Reduce Visual Effects:
1. Press Windows + R, type sysdm.cpl, and press Enter.
2. Go to the "Advanced" tab, then click "Settings" under the Performance section.
3. Select "Adjust for best performance" — this disables all animations.
4. Alternatively, choose "Custom" and uncheck options like:
  - Animate windows when minimizing and maximizing
  - Show shadows under windows
  - Fade or slide menus into view
5. Click Apply, then OK.
6. Restart your PC.
Solution 3: Free Up Disk Space and Run a System Scan

Why This Works

A cluttered hard drive forces Windows to work harder to find and write files. Running the built-in Disk Cleanup tool alongside a system file integrity scan (SFC) can remove junk files and repair corrupted system files — two common hidden causes of slow performance.
Step-by-Step Instructions
Part A — Run Disk Cleanup:
1. Press Windows + S, type "Disk Cleanup", and open the app.
2. Select your C: drive and click OK.
3. Check the boxes for:
  - Temporary files
  - Recycle Bin
  - Downloaded Program Files
  - Thumbnails
4. Click "Clean up system files" for a deeper clean.
5. Click OK and confirm deletion.
Part B — Run the System File Checker (SFC):
1. Click Start, type "cmd", and right-click Command Prompt → select "Run as administrator".
2. Type the following command and press Enter: sfc /scannow
3. Wait for the scan to complete (this may take 10–15 minutes).
4. If issues are found, run this follow-up command: DISM /Online /Cleanup-Image /RestoreHealth
5. Restart your PC once complete.
  Recommended Tool: For a deeper cleanup beyond what Windows offers natively, many users trust tools like CCleaner (free version available) to safely remove hidden junk files and fix registry errors.

Bonus Tip: Keep Windows 11 Updated

One underrated cause of slow performance is running an outdated version of Windows. Microsoft regularly releases patches that fix performance bugs and improve system efficiency. To check for updates:

Go to Settings → Windows Update.
Click "Check for updates".
Install any pending updates and restart.

For users who want full control over their PC's health — including driver updates, system monitoring, and scheduled maintenance — Iolo System Mechanic is a well-regarded option that automates many of these tasks in one dashboard.

How to Fix High RAM Usage in Windows 11 (Complete Guide)

Conclusion

A slow Windows 11 PC is frustrating, but it's rarely a hardware problem — at least not at first. By disabling unnecessary startup programs, optimizing your power and visual settings, and cleaning up your disk while repairing system files, you can restore a significant amount of speed without spending a single dollar.

Try each solution in order and restart your PC between each step to accurately measure the improvement. Most users see noticeable results after just the first two fixes.

If your PC is still sluggish after all three solutions, it may be time to consider a hardware upgrade — particularly more RAM or switching from an HDD to an SSD. But in most cases, these software-level fixes are all you need.