C:\Windows.old>rmdir /s /q windows
windows\System32\config\SECURITY.LOG2 - Access is denied.
windows\System32\config\SOFTWARE - Access is denied.
windows\System32\config\SOFTWARE.LOG - Access is denied.
windows\System32\config\SOFTWARE.LOG1 - Access is denied.
windows\System32\config\SOFTWARE.LOG2 - Access is denied.
windows\System32\config\SYSTEM - Access is denied.
windows\System32\config\SYSTEM.LOG - Access is denied.
windows\System32\config\SYSTEM.LOG1 - Access is denied.
windows\System32\config\SYSTEM.LOG2 - Access is denied.
windows\System32\config\SYSTEM~1 - Access is denied.
windows\System32\config\TxR - Access is denied.