Fix Slow Windows 10/11 Performance: Step‑by‑Step Guide (2026)

If your Windows PC feels slow, freezes randomly, or takes forever to start up, you’re not alone. Windows 10 and Windows 11 can slow down over time due to background apps, startup programs, outdated drivers, or system errors. The good news is that you can fix most performance issues in just a few minutes.

This guide walks you through the most effective, beginner‑friendly fixes to speed up your Windows computer today.

Symptoms of a Slow Windows PC

You may notice:

• Programs taking a long time to open
• Slow startup or shutdown
• Freezing or stuttering
• High disk or CPU usage
• Apps not responding
• Delayed typing or mouse movement

If any of these sound familiar, continue below.

Why Windows Gets Slow

Common causes include:

• Too many startup programs
• Background apps using CPU and RAM
• Low disk space
• Outdated drivers
• Corrupted system files
• Malware or unwanted software
• Old hard drives (HDD instead of SSD)

Now let’s fix it.

1. Disable Startup Programs (Biggest Speed Boost)

Startup apps are the #1 cause of slow Windows performance.

How to disable them:

1. Press Ctrl + Shift + Esc to open Task Manager
2. Click Startup apps
3. Disable anything you don’t need at startup
   • Examples to disable: Spotify, Discord, Steam, OneDrive, Adobe Updater

Only keep essentials like antivirus.

2. Uninstall Unnecessary Programs

Old or unused apps take up space and run background services.

Steps:

1. Open Settings
2. Go to Apps → Installed apps
3. Sort by Size
4. Remove anything you don’t use

Avoid uninstalling drivers or system tools.

3. Clean Up Disk Space

Use Storage Sense:

1. Open Settings
2. Go to System → Storage
3. Turn on Storage Sense
4. Click Cleanup recommendations

This removes temporary files, cache, and old updates.

4. Update Windows and Drivers

Outdated drivers cause lag, freezing, and crashes.

Update everything:

1. Open Settings
2. Go to Windows Update
3. Install all updates
4. Click Advanced options → Optional updates
5. Install driver updates

This alone can fix major performance issues.

5. Scan for Malware

Malware can use CPU, RAM, and network resources.

Run a quick scan:

1. Open Windows Security
2. Click Virus & threat protection
3. Run a Quick scan

If your PC still feels slow, run a Full scan.

6. Turn Off Visual Effects

Windows animations look nice but slow down older PCs.

Disable them:

1. Press Windows + R
2. Type: sysdm.cpl
3. Go to Advanced → Performance → Settings
4. Select Adjust for best performance
5. Click Apply

This gives an instant speed boost.

7. Repair Corrupted System Files

Corrupted files can cause freezing and slowdowns.

Run these commands:

1. Open Command Prompt (Admin)
2. Type: sfc /scannow
3. After it finishes, run: DISM /Online /Cleanup-Image /RestoreHealth

Restart your PC afterward.

8. Upgrade to an SSD (If You Haven’t Already)

If your PC still uses a hard drive (HDD), upgrading to an SSD is the biggest performance upgrade possible.

Benefits:

• 5–10× faster boot times
• Apps open instantly
• No freezing or stuttering

If your PC already has an SSD, you can skip this step.

Final Check: Is Your PC Faster Now?

After completing these steps, your PC should:

• Boot faster
• Open apps quicker
• Freeze less
• Use less CPU and RAM
• Feel smoother overall

If your computer is still slow, the issue may be hardware‑related (old CPU, low RAM, failing drive)

Need More Windows Fixes?

Check out more troubleshooting guides on DeskTechPro to keep your PC running smoothly.