One reliable open-source tool for securely overwriting and thereby deleting files on a Windows system is the aptly named Eraser. The program can be downloaded for free from various sites.

When you click Delete Files, Disk Cleanup will go to work cleaning up all the files in the categories you selected, as shown in Figure F. Figure F Disk Cleanup will remove any unnecessary files.

Windows won't let you delete, move, or rename a file if a program is using it. Frustratingly, it also won't tell you which program is using the file so that you can solve the problem.

If you can't delete an ISO file as the file is open in your System, check if it is mounted as a drive or not. Uses these proven fixes to resolve the issue.

More good news: you can also securely delete individual files. In this article we’ll look at open source software options for securely wiping hard disks, and secure file deletion. Delete Files and ...

If you don't usually review dump files to troubleshoot problems, they are probably wasting valuable space – here's how to delete them on Windows 10.