2. In the pop-up properties window, click Disk Cleanup, as shown:
3. Then the system will start to scan drive C, as shown in the figure below:
4. After scanning, a dialog box will continue to pop up, showing the option to delete files, and then click OK to clean them directly, as shown in the figure below:
This is the most common and convenient method for w7 computer to clean drive C, and it can be cleaned directly without third-party software.