It is easier to free up tens of gigabytes of free space in Windows 10, with the feature Disk Cleanup, which is designed to help you regain valuable hard disk space by removing system files that are no longer needed, like the junk files in recycle bin. Here’s how you should do to clean up the useless files with the disk cleaner.

1. Type disk cleanup in the search box from the Start menu, and click the Disk Cleanup option.

2. Select the drive you want to clean up and press OK.

3. Wait when it scans and calculates how much space you can free up.

4. A new dialogue window appears and you can check the files and click Clean up system files to remove them.

The files you can choose to clean includes Downloaded Program Files, Temporary Internet Files, Per user archived Windows Error Reporting, Recycle Bin, Temporary files, and Thumbnails.

However, this is far away from a clean Windows 10. You still got large but useless video files, unwanted startup programs and invalid registry keys—they could slow down your computer performance and even cause random crashes. This is why you need a stronger Windows 10 cleaner, Neptune SystemCare Ultimate, which cleans out junk files and invalid registry keys, search and frees up larger space and makes your computer faster. Here’s how to use it to make your Windows 10 cleaner.

Step 1 One-click PC Checkup

Help you find potential system issues like invalid registry entries, dump files, and privacy risks, fix them and optimize the basic items with one click.

Step 2 System Clean

In System Cleaner tab, Registry Cleaner is used to scan and repair the registry. You can use Advanced Cleaner to clean and free up more hard disk space and use Common Cleaner as a routine to erase files and traces.

Step 3 System Optimization

You really should take advantage of this section. System Optimizer is a comprehensive function to accelerate Startup and Shutdown, stabilize the system, speed up system and network. You can choose to tuneup all the items by checking the box Select All at the bottom.

Disk Defrag, Registry Defrag, and Startup Manager are delicate to help you to speed up Windows PC. You can do it when you try to have an apparent change on your boot time.