Best Free PC System Cleaner: Clean Up System Easily

If you don’t clean up unneeded files in the system for a long time, it may slow down the computer or even crash the system. In this article, there are some ways to clean your PC system with Windows built-in tools. Besides, we will also introduce you a free PC system cleaner.


By Tina / Updated on May 12, 2023

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Why need to clean the PC system?

Over time, a lot of unwanted files would be stored in your computer, which may slow down your computer system, and what's worse, if your C drive is full or nearly full, you may experience frequent freezes. Therefore, it is very necessary to regularly clean up these files on the C drive to keep your PC running better. Here, we will talk about two windows built-in tools and a free PC system cleaner to clean up the drive.

low disk space

Useful methods to clean up your PC system

In order to prevent the computer from running slowly and freezing problems because the reason that there's not enough space on C drive, here are 2 Windows built-in utilities shared with you. If you want to get effective results, please read the following carefully and choose the most suitable method to operate.

Method 1. Clean up PC system with Disk Cleanup

Disk Cleanup is a Windows built-in tool, which also plays a role as a PC C drive cleaner to help users search and delete unnecessary files, so they can free up disk storage space on the hard drive in their PC. You can follow the steps below to use Disk Cleanup.

Step 1. Input "disk cleanup" in the search box and press "Enter".

Step 2. In the small popped window, choose the target drive (here we choose C drive) and hit "OK".

Step 3. Tick all the files you want to delete and click "OK".

tick all the files you want to delete

Method 2. Clean up PC system via Storage Sense

Storage Sense is a file-cleaning feature that allows the Windows operating system to automatically free up space by deleting junk files (such as temporary files and files in the recycle bin) unneeded. You can clean the space of the system with this useful tool.

Step 1. Click "Start" and "Settings" in turn, then click "System".

click start settings and system

Step 2. In the new window, click "Storage" and turn on "Storage Sense".

turn on storage sense

Note: If you have other requirements, "Configure Storage Sense or run it now" can be helpful.

configure storage sense or run it now

The best free PC system cleaner to improve the performance of the system

When Disk Cleanup and Storage Sense can't help you, don't be worrtied, you can try the best free PC system cleaner AOMEI Partition Assistant Standard. This freeware can remove all kinds of junk files from your computer to free up more space and improve computer performance in just a few steps.

In addition, this powerful software also provides other functions including wiping hard drive, merging partitions, and cloning system to a larger hard drive. Now, you can try this free PC system cleaner to clean up your hard drive for free first.

Download Freeware Win 11/10/8.1/8/7/XP
Secure Download

Step 1. Download and open AOMEI Partition Assistant Standard. Click “Free up” in the top toolbar and choose “PC Cleaner” in turn.

click pc cleaner

Step 2. Click "Start Scan" in the new pop-up window to scan your computer for unwanted files.

click start scan

Step 3. After starting the scan, please wait for a while until the progress bar is loaded.

wait for a while

Step 4. Unneeded data will be automatically selected, you can directly click "Clean All" to delete them. If you still have other unnecessary files, you can tick the boxes of the corresponding files.

tick other files

Step 5. When you see a correct symbol displayed in the interface, you can click "Back" to leave the function.

click back after operating

Further tip: Allocate free space (advanced)

If you don’t want to delete the current files and data in the system, you can also use the "Allocate Free Space" advanced function to increase the available space of the C drive. The detailed steps are as follows. You can download the demo of the Professional Version to have a look.

Download Demo Win 11/10/8.1/8/7/XP
Secure Download

Step 1. Download and open AOMEI Partition Assistant Professional, right-click on the D drive with much free space and click "Allocate Free Space".

allocate free space

Step 2. You should preset the space size you want to allocate and the target partition in the ejected window, then click "OK".

preset the space size

Step 3. You can click "Apply" to see the result of the operation and click "Proceed" to realize it.

click apply


To conclude, this article provides you with two useful methods and a free PC system cleaner to help you free up system space, and there's obvious that AOMEI Partition Assistant Standard is the best free system cleaner for PC. If you want to try other features, including  migrating OS to SSD  and converting MBR to GPT, please turn to the Professional Version of it. If you are a Windows Server user, you must not miss the Server Edition.


Tina · Staff Editor
Tina is an English editor of AOMEI Technology. She has a positive attitude and full of energy. On her work, she always keeps thinking to figure out the solutions for users' problems, and writes the answers so that can help someone. In her daily life, she likes to sing, watch TV and sleep. She always being grateful and happy to all the things happened and all the people encountered.