How to fix: Windows 10 Slow Performance issues (Optimize Windows 10)

Last updated on October 31st, 2017

Up to today I have seen and fixed several Windows 10 computers that were running slow, even new – and supposedly faster – PC's. According to my experience, Windows may be running slow due to several reasons that affect the system's performance. 

 fix: Windows 10 Slow Performance issues.

The most common reasons that cause Windows (all versions) to run slow, are the following:

  • Malware Infections.
  • A large amount of programs that run at Windows Startup.
  • Invalid Paging File (Virtual Memory) settings.
  • Damaged hard drive.

In this tutorial I 'll show you how to troubleshoot and resolve slow performance issues on Windows 10 or Windows 8/8.1 based computers. *

* Note: Most of the steps below can be also applied on Windows 7 or Vista.

How to Optimize Windows 10/8/8.1 to run faster.

Step 1: Scan your computer for viruses and malware.
Step 2. Remove Unnecessary Startup Programs.
Step 3. Adjust Windows Performance Options
Step 4. Turn off Windows Notifications.
Step 5. Disable Defrag task.
Step 6. Disable Useless or Culprit Services.
Other solutions to fix Windows 10 Slow Performance.


Step 1: Scan your computer for viruses and malware.

Important: The first step to troubleshoot Windows 10 slow performance issues is to verify that your computer is 100% clean from harmful programs like rootkits, malware or viruses. To accomplish this task, follow the steps from this Quick Malware Scan and Removal Guide.

Step 2. Disable Unnecessary Startup Programs.

The second step to resolve the Windows performance issues in all Windows versions is to remove the useless files from your system and to eliminate the number of programs which run at Windows startup. You can perform that task easily with CCleaner:

1. Download and install CCleaner.
2. Run CCleaner and at the first screen, press the Run Cleaner button to clean the useless files from your computer (e.g. Temporary files, Temporary Internet Files, browser history, etc.)



3. Then choose Tools from the left menu and choose the Windows tab.
4. Disable (and not Delete if you are not sure about your choice) the startup applications that don't need to run at Windows Startup (e.g. Skype, OneDrive, etc.).



5. Restart your computer. *

* Note: If you are facing problems after the restart, run the CCleaner again and enable the disabled startup program(s).


Step 3. Adjust Windows Performance Options (Appearance, Virtual Memory).


1. Right click on Computer icon (Name) and select Properties.

high disk utilization windows 10

2. Click Change Settings.

high disk usage windows 10


3. At Advanced tab select Settings at Performance section.

virtual memory Windows 10


4. At Visual Effects tab choose the "Adjust for best performance" option and click Apply.

fix Windows 10 Slow Performance


5. Then click the Advanced tab and select Change at Virtual memory*  section.

* The Virtual Memory (also known as "Paging File") is an amount of space on your disk that is used from Windows (and other OS) to "extend" the installed physical memory, in order to run without problems.

virtual memory Windows 8


6. Uncheck the "Automatically manage paging file size for all drives" checkbox.
7. Check the "Custom size" radio button.

virtual memory Windows 8.1


8. Set the Initial size and Maximum size values to two and a half (2,5) times of your RAM size in MB* and then press the Set button. *

* For example: If your RAM's size is 4GB (4 x 1024MB = 4096MB), then type the value 10240 (4096MB x 2,5 = 10240MB) in the Initial & Maximum size (MB) fields.

paging file windows 8 windows 10

9. Click OK three (3) times to exit.

10. Restart your computer.

Step 4. Turn off Windows Notifications.

1. From Start menu, open Settings.

windows 10 settings


2. At settings window, select System.

settings windows 10


3. Select Notifications & actions at the left and then set the Show me tips about Windows notifications to OFF.

notifications windows 10


4. Close settings window and check if your system runs smoothly. If the problem persists then try to turn off other notifications.

Step 5. Disable Defrag task.

1. At Cortana's search box type task scheduler.

2. Open the 'Task Scheduler' desktop app.

100% disk usage windows 10


3. At the left pane go to Task Scheduler Library > Microsoft > Windows > Defrag.

task scheduler


4. At the right pane select the Schedule Defrag task and click Disable.

disable task defrag

5. Restart your computer.


Step 6. Disable Useless or Culprit Services.

In many cases, the slow performance issues on Windows 10/8/8.1, are caused by non Windows services that are started with Windows or culprit Windows services that make Windows 10 to run slow. In this case, you have to disable these services until you find out which one is responsible for the slow performance. To accomplish this task:

1. Simultaneously press the Windows key + R  keys to open the 'Run' command box.
2. In run command box, type: msconfig press Enter.


3. At Services tab, check the Hide all Microsoft services checkbox.


4. Then press the Disable all button, to disable all non Windows services that start with Windows.


5. Finally click OK and restart your computer.


6. After the restart, if you still face slow performance issues, then run msconfig again, but this time disable (uncheck) the following services one-by-one: *

  • Superfetch
  • Windows Search
  • Connected User Experiences and Telemetry

* Note: Each time disable only one service from the above list and restart your system. If, after the restart, the slow performance issue persists, then proceed and disable the next service from the above list – and restart again – until you find out which one of the mentioned services makes your computer to run slow.




Other solutions to fix Windows 10 Slow Performance.

1. Keep Windows always updated.
2. Update Device's drivers. To accomplish this task, navigate to your computer's manufacturer support page and download and install all the latest drivers for your system's components (Chipset, Video Adapter, etc.).
3. Diagnose your hard disk for damages and replace it if needed.
4. Perform a clean Windows installation (after backing up your files).
5. Replace you hard drive with a solid state drive (SSD).
6. Increase System memory (RAM).

That's it! Let me know if this guide has helped you by leaving your comment about your experience. Please like and share this guide to help others.

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