The Disk Cleanup utility removes unnecessary files to free up space on the disk drive of your choice. To run Disk Cleanup on a Windows 7 computer, follow these steps: Click Start. Click All Programs | Accessories | System Tools | Disk Cleanup.

What will happen if I do Disk Cleanup?

Disk Cleanup helps free up space on your hard disk, creating improved system performance. Disk Cleanup searches your disk and then shows you temporary files, Internet cache files, and unnecessary program files that you can safely delete.

Is it safe to use Disk Cleanup Windows 7?

For the most part, the items in Disk Cleanup are safe to delete. But, if your computer isn’t running properly, deleting some of these things may prevent you from uninstalling updates, rolling back your operating system, or just troubleshooting a problem, so they’re handy to keep around if you have the space.