Dirquota quota scan /Path:c:\
参看：
https://support.microsoft.com/en-us/topic/free-disk-space-is-not-reallocated-to-a-disk-quota-when-you-delete-files-in-windows-server-2008-r2-6563f7b9-6698-1d9e-7c1b-1fa84bcfc05f
https://social.technet.microsoft.com/Forums/zh-CN/19ea6c74-78cf-4426-bbc3-41fa1e2e76a5/windows2599120214263812115322120259912021435774234503719739069652?forum=windowsserversystemzhchs