Personally, I use this one many times a day: Pressing the Windows key plus the letter E runs the Windows Explorer, which lets you browse files on your computer.
Once you have the Explorer running, you can navigate the directory tree on the left with the arrow keys. Up and down move up and down the items; to expand one of the plus signs press the right arrow. Left arrow jumps up to the top of the current directory tree, and then pressing it again closes the current directory if you’re at the top of a directory.
Press Tab to cycle between the directory tree (on the left), the address bar (at the top, where you can type in a location such as “C:\music”), the file list (on the right), and the menu bar.
In the directory tree or the file list, pressing a letter jumps down to the next file or directory in the list that begins with that letter.
Remember, you can use Shift plus arrows to select files in a group. (You can also Ctrl+left click to select arbitrary files. You can press Ctrl+Spacebar to do the same, and keep the Ctrl held down while you use the arrow keys to move up and down the file list while moving to the next file.)
Press Delete to delete the selected file or directory (or more than one if you have selected more than one). Anything deleted will go to the trash. However, pressing Shift+Delete will delete the file permanently, without it going to the trash. You can also copy selected files by press Ctrl+C (and then Ctrl+V in a new directory to paste them, finishing the copy). Or, substitute Ctrl+X for Ctrl+C to move the selected files.