How to clean and speed up your Windows PC

Anyone who's ever owned a PC for over a few months knows they can tend to slow down over time. There are a few reasons why this happens, such as piling up files and apps, having a lot of apps running simultaneously, and having a lot of temporary files taking up valuable space. Now and then, it's a good idea to clean up your PC to make sure it's running the best it can, and there are a few things you can do to both clean up and speed up your Windows 11 computer. If you're not sure where to start, we're here to help with a few tips. Let's dive right in.

Restart your computer

A simple, but effective solution

Yes, the classic "have you tried turning it off and on again?" trick. You've most likely already tried this, but if not, restarting your PC is a great first step for better performance if it's been running for a while. It's pretty common for some people to never turn off their laptop and just close it when they're not using it, but this means more and more running apps can pile up in the background. If you haven't yet, restart your computer by doing the following:

Open the Start menu.
Click the Power icon.
Choose Restart.

Your computer will turn off and on again, and it should perform better now. Of course, this can only get you so far, so we have a few more suggestions below.

Clean up unnecessary files

Delete files you don't need anymore

Over time, your computer will store more and more files, some of which were intentionally created by you, while others might be temporary files created by the system for one reason or another. It's a good idea to clean up these files occasionally to prevent them from impacting your system performance by filling up your drive.

Screenshot of the Downloads folder on Windows 11 with multiple files selected and the delete button highlighted

A great place to start is your Downloads folder. Almost everything you download will end up here, and often, these are files you use once and never again. These can be installers for programs or documents you just need to read once. Open File Explorer and choose Downloads from the sidebar, then look through your files to delete anything you don't need anymore. Focus on large files, too, since the bigger they are, the more impact they can have on performance.

Use disk cleanup

Another way to clean up old files is to use the Disk Cleanup tool, which is now built into the Settings app on Windows 11. Disk Cleanup can delete temporary files created by the system, including many things you might not even know existed. This is a great way to free up some space on your PC, and it's a good idea to run it regularly. Here's how:

Open the Settings app.
Choose System from the sidebar.
Click Storage. Your computer may take some time to fully load the storage information.
Once it's loaded, click Temporary files.
Select all the kinds of files you want to delete.

We recommend selecting all but the Downloads option since this will delete everything in your downloads folder, and you may still need some of those files.
Click Remove files.

Wait for the process to finish, and you'll have a few extra gigabytes available on your PC. Depending on how long it's been since you've used this tool, it can free up a significant amount of space and improve your experience.

Third-party cleaner tools

In addition to the built-in disk cleanup tool in Windows, many companies offer their own cleanup solutions that can remove even more files from your system. The effectiveness of these kinds of tools can vary, but a very popular and well-known option is CCleaner. It's worth looking at if you want to clean up more temporary files.

Close power-hungry apps

There's only so much a computer can do at once

If your computer is feeling slow, it's worth checking if you have any apps running that may be using a lot of resources on the computer. If you have a demanding game or an app like Photoshop open in the background, it might affect the performance of other apps. To check which apps are using more resources, try this:

Right-click the taskbar and choose Task Manager.
Click the CPU header to sort apps by CPU usage.
If a single app is using double-digits worth of CPU resources, it may be a good idea to close it if you're not actively using it.
Try closing the app from within its own window to avoid losing data. If you can't close it normally, you can select it in Task Manager and click End task.

You may also have multiple apps using smaller amounts, which can pile up and affect performance. Close anything you don't need, but avoid closing system processes that can affect functionality.

Uninstall apps you don't need anymore

Are you still using that old printer?

In addition to files, it's common for apps to pile up on your system. Many times, you'll install a program for a specific purpose that you no longer need, or you may have an app for an old printer you're not using anymore. It's a good idea to check the apps installed on your system and uninstall the ones you don't need. To do this:

Open the Settings app.
Choose Apps from the sidebar.
Click Installed apps.
Check which apps you may not need anymore. If you're unsure about a specific app, it may be best to leave it alone, or look it up on Google to see if it's useful.
To uninstall an app, click the ... (ellipsis) button and choose Uninstall, then click Uninstall again.
If needed, follow the setup process to remove the app.

Disable startup tasks

Too many apps run when you don't need them to

On top of uninstalling apps from your system, it's also worth looking into what apps are actively running on your PC when you don't need them. Many apps like to create startup tasks, meaning they start when your computer starts, and they hog resources as soon as you turn on your PC. Some good examples are Microsoft Edge (even if you use another browser), OneDrive, Steam, and Adobe Creative Cloud. Even if you want these apps on your PC, you probably don't need them running all the time, so turning off their startup tasks is a good idea.

Right-click the taskbar on your PC and choose Task Manager.
Choose the Startup apps tab on the left side.
To turn off a startup app, click it, then choose Disable in the top menu.
Repeat the process for any app you want to disable.

After this, try restarting your PC. Without all those apps running at startup, it will probably feel much lighter and snappier.

Run a malware scan

Some viruses can slow down your PC

If you often download programs from websites you don't know that well, there's a good chance you've found yourself with some viruses on your PC, which can compromise your security and the performance of your PC. It's a good idea to run a virus scan on your PC.

Windows 11 has a built-in Windows Security app powered by Microsoft Defender, and it is a good place to start. Here's how to use it:

Open the Start menu and search for Windows Security. You'll want to choose the first option.
Click Virus & threat protection.
Choose Scan options.
Select Full scan.
Click Scan now.

Wait for the process to finish, and if it detects any malware, make sure it's removed or quarantined. If you want to go deeper, some great anti-malware tools from other providers often do a better job at detecting malware. If you don't want to spend money, a great option is MalwareBytes, which has a very powerful detection engine and can be used for free.

Disable visual effects

Windows can use a lot of resources, too

If you have a low-end PC, it's possible that visual effects in Windows can also slow down your computer. To help with this, you can turn off some visual effects that Windows uses to try to speed up your PC. A good start is turning off transparency effects:

Open the Settings app.
Choose Personalization from the sidebar.
Click Colors.
Set the toggle next to Transparency effects to Off.

If you're still running Windows 10, you actually have a few more options:

Open the Start menu and search for adjust the appearance and performance of Windows.
Choose Adjust for best performance.
Alternatively, turn off the individual options below until you're satisfied with the results.

These settings should mostly help on very low-end PCs, which is why they're no longer available on Windows 11; the system requirements are higher for that version.

Change the power mode and power plan on your PC

Squeeze more performance out of your computer

Windows laptops offer some power settings to help you balance performance and battery life. The power mode and power plan are actually different things, and they're usually set to Balanced. Still, you can adjust them for better performance if you don't mind sacrificing battery life. To change the power mode:

Open the Settings app.
Choose System from the sidebar.
Click Power & battery.
Click the dropdown menu next to Power mode and choose Best performance.

The power plan is a legacy setting that's not found as easily, but you can get to it this way:

Open the Start menu and search for Control Panel. Choose the first result.
Select Hardware and Sound.
Click Power options.
Select Best performance.

If needed, click Show additional plans to reveal this option.
Close the window.

You should now have a slightly faster computer, though battery life won't be as good if you have a laptop.

Check for updates

Having the latest software can help

Windows and its programs are constantly updated to improve performance and add new features, and it's generally a good idea to keep things up to date to get the best performance. It's also important to update your drivers, as they can contain important fixes and performance improvements, especially graphics drivers. To update Windows, follow these steps:

Open the Settings app.
Choose Windows Update from the left side menu.
Click Check for updates.

Any existing updates should be installed automatically. Sometimes, you can also receive driver updates this way. Still, the best solution here is to visit your PC manufacturer's website to check the latest drivers available for your specific model. Alternatively, we have a guide specifically for updating graphics drivers that can help with that part.