Disk Defrag

Posso deframmentare un dvd?

Hi I have a question regarding scheduel running of disk defragment
If I set the program to run in background does it mean the program still work if I turn off computer?
When I set scheduel running for the program, will it be working if the laptop is not open window?

Please tell me why on earth your programme needs to unmounts two drives after the defragmentation process, the one (J:\) that has been defragmented and the other one (O:\) that was not touched by any process of the defragmentation. Only restarting the Win10 operating system made the drives be mounted again, even a partitioning programme (MiniTool) did not find the drives before restart! Next question: how do I prevent this from happening again?
Thanks for your well appreciated help.

Non riesco a deframmentare un hard disk da 6 Tb che è fermo al 72%.
Ho comprato la licenza credendo fosse quello ma non è successo niente.

Cordiali saluti
Guglielmo Cesari

Chinese is not currently available in the language options. I kindly request your team to consider adding Chinese to the language library.

Me gustaria saber si en verdad es buena la version pro o si vale la pena pagar la suscripción ya que suelo usar tarjetas micro sd y no conozco a nadie que lo haya hecho. No se si tienen una prueba gratuita de esto que no sea la desfragmentacion simple.