Running the disk cleanup utility is a quick way to Clear out unnecessary files so option third is correct
Disk Cleanup frees up hard drive space and improves system performance. Disk Cleanup scans your hard drive and shows temporary files, Internet cache files, and unnecessary program files that can be safely deleted. You can tell Disk Cleanup to remove some or all of these files. Disk Cleanup is a computer maintenance utility included with Microsoft Windows that you can use to free up space on your computer's hard drive. Now deprecated and replaced by the latest version in the Settings app, it still exists as a Windows legacy tool. Most Disk Cleanup items and files can be safely deleted. However, removing some of them might prevent things like uninstalling updates or resetting the operating system if your computer isn't working properly. Convenient if you have the space.
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