Sadly still not working here, only new error message:
Für die virtuelle Maschine Debian Test konnte keine neue Sitzung eröffnet werden.
The virtual machine 'Debian Test' has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005).
More details may be available in 'C:\Users\Admin\VirtualBox VMs\Debian Test\Logs\VBoxStartup.log'.
Fehlercode:E_FAIL (0x80004005)
Komponente:Machine
Interface:IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}
VBoxStartup.log2148.21f8: Log file opened: 4.3.15r95226 g_hStartupLog=0000000000000054 g_uNtVerCombined=0x611db110
2148.21f8: Calling main()
2148.21f8: SUPR3HardenedMain: pszProgName=VirtualBox fFlags=0x0
2148.21f8: SUPR3HardenedMain: Respawn #1
2148.21f8: supHardenedWinVerifyImageByHandle: -> 0 (\Device\HarddiskVolume2\Program Files\Oracle\VirtualBox\VirtualBox.exe)
2148.21f8: supHardenedWinVerifyImageByHandle: -> 0 (\Device\HarddiskVolume2\Program Files\Oracle\VirtualBox\VirtualBox.dll)
2148.21f8: supR3HardenedWinDoReSpawn(1): New child 21fc.2298 [kernel32].
2148.21f8: supR3HardenedWinPurifyChild: PebBaseAddress=000007fffffde000 cbPeb=0x380
2148.21f8: supR3HardNtPuChFindNtdll: uNtDllParentAddr=0000000077830000 uNtDllChildAddr=0000000077830000
2148.21f8: supR3HardNtPuChTriggerInitialImageEvents: pvLdrInitThunk=000000007785c340 pvNtTerminateThread=00000000778817e0
2148.21f8: supR3HardNtPuChSanitizeMemory: Freeing exec mem at 0000000000060000 (0000000000060000 LB 0x2000)
2148.21f8: supR3HardNtPuChSanitizeImage: 0000000077830000 '\Device\HarddiskVolume2\Windows\System32\ntdll.dll'
2148.21f8: supR3HardNtPuChSanitizeMemory: Freeing exec mem at 00000000779e0000 (00000000779e0000 LB 0x3000)
2148.21f8: supR3HardNtPuChSanitizeImage: 000000013f500000 '\Device\HarddiskVolume2\Program Files\Oracle\VirtualBox\VirtualBox.exe'
2148.21f8: supR3HardNtPuChSanitizeImage: 000007feffb50000 '\Device\HarddiskVolume2\Windows\System32\apisetschema.dll'
2148.21f8: supR3HardenedWinDoReSpawn(1): Quitting: ExitCode=0xc0000005 rcNt=0x0
My System:
Win 7 Sp1/64, VirtualBox-4.3.15-95226-Win, Avast 2014.9.0.2021, Comodo 7.0.317799.4142