Why is my Windows 11 PC so slow? This is why + 7 fixes!

Why my computer is so slow is a frequently asked question on search engines and computer specialists.

Unfortunately, there are many reasons why a computer has become slower than you are used to. In the first place, it is often caused by software. The more we use the computer, the more it gets cluttered with installed software and associated temporary files and computer settings.

In addition, it often happens that the PC is simply outdated. Every 3 years, a new Windows version is released. These new versions bring new functionality and set new minimum system requirements.

To make a slow PC faster, we can perform several actions. I have listed these actions in this article so that anyone can perform these actions to make a slower PC faster again. These actions focus on functions within the Windows operating system. Therefore, it is not necessary to purchase new hardware.

Why is my computer so slow?

Disable background processes

To limit system usage (this way, you make working with your system faster) you can restrict apps that you don’t use or hardly use. Limiting, in this case, means that the app should not be running in the background. If you have an app running in the background and are not using it, it will consume system processes that you should be used for other apps.

However, it is your discretion which apps you want to limit by disabling background processes. Right-click on the Start button. In the menu, click “Apps and Features”.

In the list of installed apps, click the three horizontal dots on the right side to open the menu. In the menu, click “Advanced Options.” Do this for each app where you want to disable background processes.

In the “Advanced Options” of this particular app, change the “Let this app run in the background” option to “Never”. Also, immediately check that “Runs at login” is disabled. Again do this for every app you want to disable running in the background.

Disable - let this app run in the background

Delete temporary files

Deleting temporary files makes your PC faster and also frees up disk space in the process. Therefore, it is recommended that you periodically, every 3 months remove the temporary files from your computer to keep it in top shape.

Right-click on the Start button. In the menu, click on Settings. Then click first on System and then on Storage.

You will see a graph here showing the number of temporary files. You will also see the number of gigabytes of temporary files consumed on your computer. Click on “Temporary files”.

Storage settings in Windows 11

Windows will now calculate how much data can be removed from temporary files. Next, you will see the temporary files and other categories listed. If necessary, you can disable or enable a specific category. When you are finished, click on the “Remove files” button.

Remove temporary files in Windows 11

Free up disk space by uninstalling old software

For Windows to work correctly, ensure your computer always has 2GB of free disk space available. This 2GB allows for swap and temporary files that apps need to keep working correctly.

So you free up disk space by uninstalling unused apps. You have already done this by removing the above temporary files. However, you can go even further by deleting apps that you no longer use as well. You should also check every 3 months to see if there is any software installed that you no longer use.

Right-click on the Start button. In the menu, click on “apps and features”. Check the list of installed apps. If there is an app listed that you no longer use, click on the 3 horizontal dots. In the menu, click on uninstall.

Uninstall old software you do not need in Windows 11

Also, check the “Downloads” folder in your computer’s user profile. It often contains unnecessary large installation files and files you have previously downloaded and may not need.

Check for disk problems with chkdsk

If you are still using a hard drive and not an SSD, it is recommended that you check the drive for errors. Also, defragmenting the hard drive is something you should perform every so often.

Chkdsk examines disk space and usage and provides a status report specific to each file system. The status report shows errors found in the file system.

Right-click on the Start button. In the menu, click on “Windows Terminal (administrator).

Type the following command to start chkdsk the next time the system is booted.

chkdsk C: /F /r

Starting chkdsk directly is not possible because the volume is already in use. The chkdsk tool will run at the next reboot, confirm with the “y” key if you wish to do so.


Check your computer for malware

If you have no idea why your PC has become so slow, and you notice that the PC is consuming too many system processes, check your PC for malware. More and more malware is using the computer to mine crypto and exploiting for botnets, phishing, and other attacks. Therefore, malware may be active in the background if your computer suddenly becomes very slow for no apparent reason.

It is therefore advisable to check your computer for malware anyway. It can do no harm. It is safe, and you will be reassured if it does not find anything. If it does find some malware, that problem is solved.

Check your PC for malware with Malwarebytes. This software is free to use for 14 days to detect and remove malware on your PC.

Repair damaged system files automatically

You can have the system scanned and damaged system files repaired automatically in Windows. By repairing these system files, you can at least be sure that it is not because of system files and Windows processes that you have slowed down your computer. It is a solution that anyone can perform, although it does take some time.

To begin repairing system files and processes, right-click on the Start button. Then, click on “Windows Terminal (administrator)” in the menu.

You will begin by running the following command. Copy and paste the command below into the Terminal window:

dism /online /cleanup-image /restorehealth

The DISM command tool offers three options to repair an installation, including “CheckHealth,” “ScanHealth,” and “RestoreHealth” which you will want to use in this order.

Also, depending on the computer problem, you can use the “RestoreHealth” option to repair the locally available installation using different source files. RestoreHealth is what we are going to run.

dism clean up

Once this command is complete, then copy and paste the below command into the Terminal window:

SFC /scannow

The command sfc /scannow scans all protected system files, and replaces, damaged files with a compressed copy that resides in a compressed folder at %WinDir%\system32\dllcache. This takes a while.

sfc scannow

Check the Computer for Memory Problems.

Memory problems with RAM in your Windows 11 PC can lead to loss of data and the computer system becoming unresponsive or slower. Performing a check to ensure the memory is not damaged can help resolve the slowing down of your computer.

Right-click on the Start button. In the menu, click on Run. In the Run window type: mdsched.exe

You can restart your computer immediately and search for memory problems or leave it to search for memory problems only when you restart the computer yourself.

Windows memory diagnostic

These are the 7 tips you can apply to make a computer that has become slower faster again. I hope that I have helped you with this. Thank you for reading!

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