virtualbox.org

A few weeks ago I managed to open a windows xp VM for some uni projects that work only on windows XP. Today when I tried to start my VM it said :

Failed to open a session for the virtual machine windowsxp.

The configuration constructor in main failed due to a COM error. Check the release log of the VM for further details. (VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR).

Result Code: E_FAIL (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

This is the further log

00:00:01.698378 VirtualBox VM 6.0.4 r128413 win.amd64 (Jan 25 2019 18:13:23) release log
00:00:01.698382 Log opened 2019-04-23T16:19:54.503971600Z
00:00:01.698383 Build Type: release
00:00:01.698386 OS Product: Windows 10
00:00:01.698387 OS Release: 10.0.17134
00:00:01.698387 OS Service Pack: 
00:00:01.773005 DMI Product Name: MS-7B33
00:00:01.777043 DMI Product Version: 1.0
00:00:01.777050 Host RAM: 16326MB (15.9GB) total, 10534MB (10.2GB) available
00:00:01.777053 Executable: C:\Program Files\Oracle\VirtualBox\VirtualBoxVM.exe
00:00:01.777053 Process ID: 8492
00:00:01.777053 Package type: WINDOWS_64BITS_GENERIC
00:00:01.778037 Installed Extension Packs:
00:00:01.778058   None installed!
00:00:01.778541 Console: Machine state changed to 'Starting'
00:00:01.778884 Qt version: 5.6.2
00:00:01.780323 GUI: UIMediumEnumerator: Medium-enumeration finished!
00:00:01.840070 SUP: Loaded VMMR0.r0 (C:\Program Files\Oracle\VirtualBox\VMMR0.r0) at 0xXXXXXXXXXXXXXXXX - ModuleInit at XXXXXXXXXXXXXXXX and ModuleTerm at XXXXXXXXXXXXXXXX using the native ring-0 loader
00:00:01.840085 SUP: VMMR0EntryEx located at XXXXXXXXXXXXXXXX and VMMR0EntryFast at XXXXXXXXXXXXXXXX
00:00:01.840089 SUP: windbg> .reload /f C:\Program Files\Oracle\VirtualBox\VMMR0.r0=0xXXXXXXXXXXXXXXXX
00:00:01.841215 AssertLogRel F:\tinderbox\win-6.0\src\VBox\Main\src-client\ConsoleImpl2.cpp(748) int __cdecl Console::i_configConstructorInner(struct UVM *,struct VM *,class util::AutoWriteLock *): !FAILED(hrc)
00:00:01.841224 hrc=REGDB_E_CLASSNOTREG
00:00:01.841303 Constructor failed with rc=VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR pfnCFGMConstructor=00007ffefd0e4c30
00:00:01.841424 VMSetError: F:\tinderbox\win-6.0\src\VBox\VMM\VMMR3\VM.cpp(326) int __cdecl VMR3Create(unsigned int,const struct VMM2USERMETHODS *,void (__cdecl *)(struct UVM *,void *,int,const char *,unsigned int,const char *,const char *,char *),void *,int (__cdecl *)(struct UVM *,struct VM *,void *),void *,struct VM **,struct UVM **); rc=VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR
00:00:01.841427 VMSetError: The configuration constructor in main failed due to a COM error. Check the release log of the VM for further details.
00:00:01.842070 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={872da645-4a9b-1727-bee2-5585105b9eed} aComponent={ConsoleWrap} aText={The configuration constructor in main failed due to a COM error. Check the release log of the VM for further details. (VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR)}, preserve=false aResultDetail=-6400
00:00:01.842240 Console: Machine state changed to 'PoweredOff'
00:00:01.872417 Power up failed (vrc=VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR, rc=E_FAIL (0X80004005))
00:00:02.373628 GUI: UIMachineViewNormal::resendSizeHint: Restoring guest size-hint for screen 0 to 1024x768
00:00:02.373716 ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={ab4164db-c13e-4dab-842d-61ee3f0c1e87} aComponent={DisplayWrap} aText={The console is not powered up}, preserve=false aResultDetail=0
00:00:02.374236 GUI: Aborting startup due to power up progress issue detected...

What happened?

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Try searching for the error text (the CAPITALIZED_UNDERSCORE_SPACED words) in a web browser with the text "site:forums.virtualbox.org" added to restrict searching to this forum.

This web search:

VERR_MAIN_CONFIG_CONSTRUCTOR_COM_ERROR site:forums.virtualbox.org

reveals that Virtualbox may not be installed properly. Try finding the installer and re-run it by right-clicking the installer icon and choosing Run As Administrator. (Note, 'Right-click Run As Administrator' is not 'log-off-log-back-on-as-an-administrator', nor is it 'I'm-already-admin-so-I-don't-need-to-right-click'. You need to do the right-click method even if you are already an admin on Windows hosts to get Virtualbox to install correctly. It's a Windows thing...)