Immediatly after starting installation I get a message inviting me to post the vbox.log and vbox.png here.
Log file attached in zip format for because of kb-limit reasons. Below the last rows of the log.
Thank you for your help.00:01:47.475499 E1000#0: Larger TX frames : 0
00:01:47.475503 E1000#0: Max TX Delay : 0
00:01:47.476697 NEM: Destroying partition 0000000009a607b0 with its 1 VCpus...
00:01:47.479321 Changing the VM state from 'DESTROYING' to 'TERMINATED'
00:01:47.481063 Console: Machine state changed to 'PoweredOff'
00:01:48.537307 GUI: UIMachineViewNormal::resendSizeHint: Restoring guest size-hint for screen 0 to 800x600
00:01:48.537392 ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={4680b2de-8690-11e9-b83d-5719e53cf1de} aComponent={DisplayWrap} aText={The console is not powered up}, preserve=false aResultDetail=0
00:01:48.537943 GUI: Passing request to close Runtime UI from machine-logic to UI session.
00:01:48.537995 GUI: Aborting startup due to invalid machine state detected: 1
Federico