SDelete

When you erase a confidential file, you need to make sure it cannot be retrieved even if someone uses a dedicated recovery application. For example, you can use SDelete, a tool created especially for such situations.
Since it is a command-line utility, SDelete can be used mostly by experts as beginners might not be willing to learn the needed syntax and commands in order to efficiently erase their files or folders, and will most likely look for an app that also features a graphical interface.
However, one of the major advantages of using a command-line tool is that it requires much less RAM and CPU resources in order to function, and it also loads faster than a GUI product.
When you run SDelete, you will be able to read a summary of the functions the app supports, and you can specify the one you want to initiate.
More precisely, you can choose to clean the free space from a selected logical disk or to set it to run in the background, without displaying any reports regarding its tasks.
SDelete can also come in handy when you cannot erase a file because it is read-only, as it can remove this attribute thus allowing you to delete the item.
You can also specify the number of passes you want SDelete to make when removing files or folders; however, you need to keep in mind that if you enter a large number, the process will take a longer time to complete, but the results will be more secure.
All in all, SDelete is a powerful command-line tool that is especially designed for PC experts and can help them rest assured that no recovery app can restore data they have erased.