KB2976536 breaks VirtualBox on Windows 8.1

[firsak]

After installing November 2014 anti-malware platform update for Windows Defender in Windows 8.1 and Windows 8 (KB2976536), I get this when trying to launch a virtual machine: see attachment.
Uninstalling KB2976536 solves the problem (disabling Windows Defender doesn't).

Code: Select all

VirtualBox GUI VM Selector Window 4.3.14 r95030 win.amd64 (Jul 15 2014 16:09:05) release log
00:00:02.244522 Log opened 2014-11-15T15:40:33.011469500Z
00:00:02.244522 Build Type: release
00:00:02.244522 OS Product: Windows 8.1
00:00:02.244522 OS Release: 6.3.9600
00:00:02.244522 OS Service Pack: 
00:00:02.264580 DMI Product Name: H87N
00:00:02.267992 DMI Product Version: To be filled by O.E.M.
00:00:02.267992 Host RAM: 16261MB total, 14400MB available
00:00:02.267992 Executable: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
00:00:02.267992 Process ID: 5952
00:00:02.267992 Package type: WINDOWS_64BITS_GENERIC
00:00:02.271986 UIMediumEnumerator: Medium-enumeration started...
00:00:37.787029 UIMediumEnumerator: Machine registration event received, ID = 76f1bc23-1acf-49e1-aa79-b968d3366468
00:00:37.797046 UIMediumEnumerator:  New usage: 57ae4e07-e987-4490-b447-85fe2c375d6a
00:00:37.800057 UIMediumEnumerator:  Medium with key={57ae4e07-e987-4490-b447-85fe2c375d6a} cached.
00:00:37.800057 UIMediumEnumerator: Machine registration event processed, ID = 76f1bc23-1acf-49e1-aa79-b968d3366468
00:00:37.805042 UIMediumEnumerator: Medium-enumeration finished!
00:01:02.761440 ERROR [COM]: aRC=E_UNEXPECTED (0x8000ffff) aIID={12f4dcdb-12b2-4ec1-b7cd-ddd9f6c5bf4d} aComponent={Session} aText={The session is not locked (session state: Unlocked)}, preserve=false

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VirtualBox COM Server 4.3.14 r95030 win.amd64 (Jul 15 2014 16:09:05) release log
00:00:00.001000 main     Log opened 2014-11-15T15:40:32.061872000Z
00:00:00.001000 main     Build Type: release
00:00:00.001000 main     OS Product: Windows 8.1
00:00:00.001000 main     OS Release: 6.3.9600
00:00:00.001000 main     OS Service Pack: 
00:00:00.032959 main     DMI Product Name: H87N
00:00:00.037964 main     DMI Product Version: To be filled by O.E.M.
00:00:00.037964 main     Host RAM: 16261MB total, 14411MB available
00:00:00.037964 main     Executable: c:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.037964 main     Process ID: 5980
00:00:00.037964 main     Package type: WINDOWS_64BITS_GENERIC
00:00:00.048988          usbLibDevStrDrEntryGet: DeviceIoControl 1 fail winEr (31)
00:00:00.770188          HostDnsMonitorProxy: Host's DNS information updated:
00:00:00.826702          VDInit finished
00:00:36.462934          Loading settings file "C:\Users\Administrator\VirtualBox VMs\WinXP64Virtual\WinXP64Virtual.vbox" with version "1.14-windows"
00:00:36.466089          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={fafa4e17-1ee2-4905-a10e-fe7c18bf5554} aComponent={VirtualBox} aText={Could not find a registered machine with UUID {76f1bc23-1acf-49e1-aa79-b968d3366468}}, preserve=false
00:00:36.495107          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={480cf695-2d8d-4256-9c7c-cce4184fa048} aComponent={Machine} aText={This machine does not have any snapshots}, preserve=false
00:00:54.600689          ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={480cf695-2d8d-4256-9c7c-cce4184fa048} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
00:00:59.882847 Watcher  ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={480cf695-2d8d-4256-9c7c-cce4184fa048} aComponent={Machine} aText={The virtual machine 'WinXP64Virtual' has terminated unexpectedly during startup with exit code 1}, preserve=false
00:01:07.973069 main     ERROR [COM]: aRC=VBOX_E_OBJECT_IN_USE (0x80bb000c) aIID={05f2bbb6-a3a6-4fb9-9b49-6d0dda7142ac} aComponent={Medium} aText={Medium 'D:\Distr\OS\Windows XP 64\WinXP64Virtual.vdi' cannot be closed because it is still attached to 1 virtual machines}, preserve=false
00:01:07.977380 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={fafa4e17-1ee2-4905-a10e-fe7c18bf5554} aComponent={VirtualBox} aText={The object is not ready}, preserve=false

[firsak]

OK, so the problem was actually fixed in versions 4.3.16 and 4.3.18.
That rises a different question - what's the point in "Check for updates" button in the "Help" section if it keeps telling me that I have the most recent version, although I'm still on 4.3.14?

[scottgus1]

A recent post on the forum says, if I remember right, that the developers don't always tell the update system that a newer version is available until they're sure it's good. 4.3.14 & onward is still in the throes of the security hardening issue, so the update system is still set back at 4.3.12 (I think, I can't find the post right now)