Use the Best Junk Cleaner for PC to Free Up Disk Space

With an all-around cleaning app, it'll be easier for all users to improve their computer's speed, eliminate destructive infections, and protect their Windows system health and safety. It includes PC maintenance tools for removing malware and junk files and improving your computer's speed and functionality.

Why need to clean junk files regularly?

Junk files are temporary files. When your computer executes tasks, those files can help the system run faster without long-time requirements. But these files will quickly be outdated after they have a hand in the task of running apps and system. They don't disappear automatically, the system won't recognize them as junk so they accumulate on the disk, then your disk will lose much available capacity for your important data.

All temp Internet files, system files, cache files, program data files, Thumbnails, and other useless files can all be called junk files. Once they occupy too much space on the drive, your PC will suffer many annoying issues. First, you might receive a warning of low disk space, then your system may lag or be frozen. What’s worse, if the rest space is not enough, your Windows update will fail and you might meet a BSOD problem.

Best junk cleaner for PC

To simply clean all junk files on your computer, here we recommend you the best junk file cleaner for PC—AOMEI Partition Assistant Standard, a free disk and partition management program for Windows OS. This app supports Windows 11/10/8/8.1/7/XP systems. Its “PC Cleaner” function is an intelligent junk cleaner. You can scan the selected disks and drives and filter the unnecessary files from all data, and after the scan, you can clean them all with one click.

After the cleaning, you can defrag your hard drive to optimize your HDD for better performance.

Step 1. Install and launch AOMEI Partition Assistant Standard, and then click "Free up" > "PC Cleaner".

Step 2. In the pop-up window, click "Start Scan" to scan for junk files.

Step 3. Wait until the scanning process completes.

Step 4. After the scan is completed, all kinds of available junk files will be listed. Then, tick the options you want to clean, then click "Clean All" to begin the cleaning process.

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

Then the junk files will be cleared.

Further reading: How to free up more disk space?

After the cleaning, your disk should have more available space. But, if you still need to release more free space on your system drive, you can keep going to choose a proper method according to your situation.

Opt. 1. App Mover

If there are some programs or games you installed on the C drive inadvertently, you can upgrade the software to the Professional Edition to unlock the “App Mover” feature. This feature can help you move the installed programs to another drive or another disk. If you have another disk, you can move some to another location without reinstalling. And all moved apps can run smoothly as before.

Step 1. Click “Free up”, then select the “App Mover” feature.

Step 2. In the new window, click “App Mover”.

Step 3. In the pop-up window, choose the partition that you want to free up via moving apps (here is partition C) and click “Next”.

Step 4. All movable apps on the C drive will be listed. You can choose one or multiple apps that you need to move and the destination partition. Then click “Move” to execute the operation.

Step 5. Confirm that you have closed the apps that you will move from C drive to D drive. Then, click "OK".

Step 6. Wait for the move process to complete. Then, click "Finish".

Opt. 2. Allocate free space

If your disk has more than one partition, and the data partition has sufficient space, the “Allocate Free Space” of AOMEI Partition Assistant can share part of the free space on that partition with the C drive.

Step 1. Right-click the data partition and choose the button "Allocate Free Space".

Step 2. Choose the size and destination drive you want.

Step 3. Please check your procedures in "Pending Operations" on the sidebar. Please click "Apply" to commit. After that, another window will show up. Please select "Proceed".

Tip: If there’s unallocated space on your drive, even if it’s not on the right of your C drive, you can merge it into your C drive to extend the space.

Summary

AOMEI Partition Assistant is the best junk cleaner for PC with Windows OS. It also allows users to clone disk, convert to MBR/GPT without deleting data, migrate OS… And it has the Server Edition for Windows Server 2025/2022/2019/2016/2012(R2)/2008(R2)/2003.