Deleting a large folder using the Windows explorer could take very long time. The quicker way to delete a folder by using the Windows command line.
To do this;
Use rmdir /s /q foldername or del /f /s /q foldername
For example, if you want delete the folder c:\data\accounting\archive, do this:
1. Open Windows Command prompt (start->cmd)
2. Browse to the location of the folder: cd c:\data\accounting
3. Run the delete command: del /f /s /q archive