Notes on Deleting Files in Windows

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del /F /S /Q <target>

Deletes all files in target directory.  Fastest, but will not get around permission issues or other stubborn file/folder issues, and also leaves behind directory structures.

rmdir /S /Q <target>

Helpful when removing an entire directory tree, and can be used to "clean up" the directory structures left behind from del command, but has same issues with certain files/folders.

robocopy <src> <target> /MIR | out-null

When source is made to be empty directory, use this command in PowerShell to overwrite stubborn folders/files that would not delete with above commands; slowest of the three.