How to Fix Windows 10 Running Slow (Step-by-Step Guide)

byFixMyWindows Team -
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When your computer is sluggish, even basic tasks like opening a browser or starting Word can feel tedious. If you’re on Windows 10 and notice your system slowing down over time, you’re not the only one. It’s a common issue. 

Files accumulate, extra programs sneak into your startup, drivers become outdated, and suddenly your PC feels like it’s moving through molasses.

The good news is, you don’t need to be a tech expert to get things running smoothly again. Most causes of slowdowns are easy to fix. Let’s go through the solutions together.

Common Reasons Why Windows 10 Becomes Slow

Before applying the fixes, it helps to understand what causes slow performance. Some of the most common reasons include:

  • Too many startup programs
  • Insufficient RAM.
  • A hard drive that’s nearly full or fragmented
  • Malware or suspicious software
  • Outdated drivers
  • Too many background apps using up resources
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Once you identify the possible causes, you can apply the solutions below.

Method 1: Restart Your Computer

Sometimes a slow computer is caused by temporary system processes running in the background. Restarting your computer clears these processes and refreshes system memory.

Steps to Restart Windows 10

  1. Click the Start menu.
  2. Select the Power icon.
  3. Click Restart.

4.       Let Windows restart, then check if performance improves

Method 2: Disable Unnecessary Startup Programs

Many apps set themselves to launch with Windows. Too many startup programs can slow down your computer before you’ve even opened anything.

Steps to Disable Startup Programs

  1. Press Ctrl + Shift + Esc to open Task Manager.
  2. Click the Startup tab.
  3. Look for programs with High impact on startup.
  4. Right-click the unnecessary program.
  5. Select Disable.

Restart your computer after disabling startup programs.

Method 3: Close Background Applications

Some programs keep running in the background, using CPU or memory even if you’re not using them.

Closing unnecessary background apps can help speed up your system.

Steps to Close Background Programs

1.      Open Task Manager using Ctrl + Shift + Esc.

2.      Click the Processes tab.

3.      Look for programs using high CPU or Memory.

4.      Select the program.


5.      Click End Task.

Be careful not to close important system processes.

Method 4: Free Up Disk Space

If your system drive is almost full, Windows performance may slow down. Removing unnecessary files can free up storage and improve speed.

Steps to Clean Disk Space

  1. Open File Explorer.
  2. Right-click the C drive.
  3. Select Properties.
  4. Click Disk Cleanup.


  1. Select files to delete, such as:
    • Temporary files
    • Recycle bin
    • System cache
  2. Click OK.

This removes unnecessary files and frees up storage space.

Method 5: Scan for Malware

Malware or viruses can significantly slow down your computer by consuming system resources.

Running a security scan can detect and remove malicious software.

Steps to Scan for Malware

  1. Open Windows Security.
  2. Click Virus & Threat Protection.
  3. Select Quick Scan.
  4. Wait for the scan to complete.
  5. Remove any detected threats.

Keeping your system free from malware helps maintain performance.

Method 6: Update Windows

Outdated system files can cause performance problems. Installing the latest updates can fix bugs and improve system stability.

Steps to Update Windows

  1. Open Settings.
  2. Click Update & Security.
  3. Select Windows Update.
  4. Click Check for updates.
  5. Install any available updates.

Restart your computer after installing updates.

Method 7: Update Device Drivers

Outdated or incompatible drivers can cause slow performance or system instability.

Updating drivers ensures that your hardware works efficiently.

Steps to Update Drivers

  1. Right-click the Start button.
  2. Select Device Manager.
  3. Expand the device category.
  4. Right-click the device.
  5. Click Update driver.


 

  1. Select Search automatically for drivers.

Repeat this process for important hardware such as graphics and network adapters.

Method 8: Adjust Windows Performance Settings

Windows includes visual effects and animations that can reduce performance on slower computers.

Disabling these effects can improve speed.

Steps to Optimize Performance

  1. Press Windows + R.
  2. Type sysdm.cpl and press Enter.
  3. Go to the Advanced tab.
  4. Under Performance, click Settings.
  5. Select Adjust for best performance.


  1. Click Apply and then OK.

This reduces visual effects and improves system responsiveness.

Method 9: Check Hard Drive Health

A failing hard drive can cause serious performance issues. Checking disk health helps identify potential problems.

Steps to Check Disk Errors

  1. Open Command Prompt as administrator.
  2. Type the following command:

chkdsk C: /f

 




  1. Press Enter.
  2. Restart the computer if prompted.

Windows will scan and repair disk errors automatically.

Additional Tips to Speed Up Windows 10

Here are some extra tips to keep your computer running smoothly:

  • Remove unused software from your computer.
  • Keep your drivers updated.
  • Avoid installing unnecessary applications.
  • Use reliable antivirus software.
  • Restart your computer regularly.

Maintaining your system properly can prevent slow performance.

When to Upgrade Hardware

If your computer remains slow even after trying all the solutions above, the hardware may be outdated.

Consider upgrading:

  • RAM for better multitasking
  • SSD instead of HDD for faster storage
  • Processor upgrade if supported
Low RAM is one of the main reasons for system lag and freezing.

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Upgrading hardware can significantly improve performance, especially on older computers.

Conclusion

A slow computer can make everyday tasks frustrating, but in most cases, the issue can be fixed with simple troubleshooting steps.

The most effective ways to fix Windows 10 running slow include:

  • Restarting the computer
  • Disabling startup programs
  • Closing background applications
  • Cleaning unnecessary files
  • Updating Windows and drivers
  • Scanning for malware
  • Adjusting performance settings

By following the methods in this guide, you can significantly improve your computer’s speed and overall performance.

Regular maintenance and system updates will also help prevent slowdowns in the future.

 

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