We all know how to delete files or move the file to recycle bin, but the files are not deleted thoroughly, if you want to delete those files permanently, follow below steps.
1.Open the folder and locate the file you want to delete permanently.
2.Press Shift + Delete key at the same time, a window will pop up, asking you "Are you sure you want to permanently delete this file? ", the file name and created date information will be listed below. Click Yes to complete the deleting process, if you don't want to do so, Click No.
1.Click Computer on your desktable and right click Disk C to select Properties.
2.Click Disk Cleanup, you'll see a window just as right, this process need some minutes.
3.Under Disk Cleanup there are Files to delete, tick the files you don't need to free pc space, finally click OK.