VirtualBox no longer working after latest set of Windows 10 security patches.

[baseballbob]

I already submitted a Windows 10 feedback on this, as I'm not sure if it's a Windows 10 bug or a VirtualBox issue.

After last week's Windows 10 Pro security patches, I can no longer start a VirtualBox virtual machine. On version 5.26, it gives the error

verr_intnet_flt_if_not_found

when using a Windows 7 machine with a bridged wifi and Ethernet network. On VirtualBox version 6.04, it just hangs forever at the "Starting virtual machine" screen, and I have to kill the process to cancel it.

Even before this set of patches, it had run fine on 5.22 and 5.26, but

6.04 would always hang after getting almost all the way through the boot process, up to starting most of the commands in the startup folder. That would happen from Windows 10 to Windows 7 or 10 VMs, and from Linux Ubuntu 18 to Windows 10 VMs with a similar set of startups, but not from Mac OSX to Windows 10; that one ran fine.

[Socratis]

It's usually better and faster, if issues get first addressed in the ​VirtualBox forums, a lot more eyes there. More than 95% of the issues are resolved in the forums, which keeps the developers focusing on the bug fixes and enhancements, and there is no need for another ticket to keep track of. For example, yours is most probably not a bug and someone from the developers has to deal with it and close it as "Invalid".

Plus a discussion and analysis on the bug tracker is going to help you, me, and potentially a future drive-by user or two. Not so in the forums, many more tend to benefit...

A technique that we've used in the forums that has solved a lot of headaches is:

• Uninstall VirtualBox. Your VMs are going to be untouched. Reboot.

• You may want to clean up your registry and/or filesystem at this point. CCleaner is a freeware utility that could help you. Mind the installation, it comes with "offers" from 3rd parties, known as "bundleware". Also, check out the ​Device Cleanup program that helps you to remove any unused devices from your computer.

• Download (if you haven't already) the latest VirtualBox and its matching ExtPack. Store them in a common location, i.e. not on "Desktop", or "Documents", but to "Public/Downloads" for example.

• Uninstall (don't simply disable) all 3rd party antivirus. If you're afraid about your computer being vulnerable, pull the Ethernet plug, disconnect your WiFi, don't go browsing around.

• Locate the downloaded file in Windows Explorer. Right-click on the installer and select "Run-as-Administrator", even if you are the administrator. At the end of the installation, choose to "Start Oracle VM VirtualBox". Do not worry if your VMs do not show up.

• If you're going to install the ExtPack, go to File » Preferences » Extensions. Click on the icon with the orange, down-pointing arrow on the right. Select the ExtPack from the previous steps.

• Quit VirtualBox. Re-start VirtualBox as you would normally, i.e. from the Desktop shortcut or the Start menu.

• Update the Guest Additions (GAs) in your guest(s), if the GAs are available for a specific guest.

PS. Indenting your sentences by a space or two, has a different meaning in WikiFormatting. Just look at how your message looks in it final rendering. You should always use the "Preview" before actually posting your message... ;)

[Stanzilla]

I have the same problem and I think it might be because they recently enabled Retpoline by default.

00:00:05.503108 VM: fHMEnabled=true  (configured) fRecompileUser=false fRecompileSupervisor=false
00:00:05.503110 VM: fRawRing1Enabled=false CSAM=true  PATM=true 
00:00:05.503494 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:05.542048 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...
00:00:05.542062 NEM: WHvCapabilityCodeExtendedVmExits      = 0x0000000000000007
00:00:05.542070 NEM:                       fExtendedMsrExit: 1
00:00:05.542076 NEM:                     fExtendedCpuIdExit: 1
00:00:05.542082 NEM:                      fExtendedXcptExit: 1
00:00:05.542089 NEM: Warning! Unknown feature definitions: 0x1f
00:00:05.542100 NEM: Supported exception exit bitmap: 0x1
00:00:05.542112 NEM: WHvCapabilityCodeProcessorVendor      = 1 - Intel
00:00:05.542125 NEM: WHvCapabilityCodeProcessorFeatures    = 0x0081704041f7019f
00:00:05.542156 NEM:                            Sse3Support: 1
00:00:05.542165 NEM:                        LahfSahfSupport: 1
00:00:05.542172 NEM:                           Ssse3Support: 1
00:00:05.542178 NEM:                          Sse4_1Support: 1
00:00:05.542185 NEM:                          Sse4_2Support: 1
00:00:05.542192 NEM:                           Sse4aSupport: 0
00:00:05.542198 NEM:                             XopSupport: 0
00:00:05.542204 NEM:                          PopCntSupport: 1
00:00:05.542211 NEM:                      Cmpxchg16bSupport: 1
00:00:05.542217 NEM:                       Altmovcr8Support: 0
00:00:05.542223 NEM:                           LzcntSupport: 0
00:00:05.542229 NEM:                     MisAlignSseSupport: 0
00:00:05.542235 NEM:                          MmxExtSupport: 0
00:00:05.542241 NEM:                        Amd3DNowSupport: 0
00:00:05.542247 NEM:                ExtendedAmd3DNowSupport: 0
00:00:05.542253 NEM:                         Page1GbSupport: 0
00:00:05.542259 NEM:                             AesSupport: 1
00:00:05.542265 NEM:                       PclmulqdqSupport: 1
00:00:05.542270 NEM:                            PcidSupport: 1
00:00:05.542277 NEM:                            Fma4Support: 0
00:00:05.542284 NEM:                            F16CSupport: 1
00:00:05.542290 NEM:                          RdRandSupport: 1
00:00:05.542296 NEM:                        RdWrFsGsSupport: 1
00:00:05.542302 NEM:                            SmepSupport: 1
00:00:05.542309 NEM:              EnhancedFastStringSupport: 1
00:00:05.542316 NEM:                            Bmi1Support: 0
00:00:05.542322 NEM:                            Bmi2Support: 0
00:00:05.542328 NEM:                           MovbeSupport: 0
00:00:05.542334 NEM:                          Npiep1Support: 1
00:00:05.542341 NEM:                   DepX87FPUSaveSupport: 0
00:00:05.542346 NEM:                          RdSeedSupport: 0
00:00:05.542353 NEM:                             AdxSupport: 0
00:00:05.542415 NEM:                   IntelPrefetchSupport: 0
00:00:05.542427 NEM:                            SmapSupport: 0
00:00:05.542433 NEM:                             HleSupport: 0
00:00:05.542439 NEM:                             RtmSupport: 0
00:00:05.542444 NEM:                          RdtscpSupport: 1
00:00:05.542451 NEM:                      ClflushoptSupport: 0
00:00:05.542457 NEM:                            ClwbSupport: 0
00:00:05.542465 NEM:                             ShaSupport: 0
00:00:05.542473 NEM:                X87PointersSavedSupport: 0
00:00:05.542482 NEM: Warning! Unknown CPU features: 0x81704041f7019f
00:00:05.542505 NEM: WHvCapabilityCodeProcessorClFlushSize = 2^8
00:00:05.543328 NEM: Warning! Unknown capability 0x1003 returning: 07 00 00 00 00 00 00 00
00:00:05.544912 NEM: VidGetHvPartitionId            -> fun:0x2210a7 in:0x0 out:0x8
00:00:05.544935 NEM: VidStartVirtualProcessor       -> fun:0x221174 in:0x4 out:0x0
00:00:05.544944 NEM: VidStopVirtualProcessor        -> fun:0x221180 in:0x4 out:0x0
00:00:05.544967 NEM: VidMessageSlotHandleAndGetNext -> fun:0x2210df in:0x8 out:0x0
00:00:05.545370 NEM: Created partition 00000000011826a0.
00:00:05.545651 NEM: NEMR3Init: Active.
00:00:05.545816 MM: cbHyperHeap=0x140000 (1310720)
00:00:05.546964 CPUM: No hardware-virtualization capability detected
00:00:05.548281 CPUM: fXStateHostMask=0x7; initial: 0x7; host XCR0=0x7
00:00:05.552217 CPUM: Matched host CPU INTEL 0x6/0x3a/0x9 Intel_Core7_IvyBridge with CPU DB entry 'Intel Core i5-3570' (INTEL 0x6/0x3a/0x9 Intel_Core7_IvyBridge)
00:00:05.552482 CPUM: MXCSR_MASK=0xffff (host: 0xffff)
00:00:05.552584 CPUM: Microcode revision 0x00000020
00:00:05.552663 CPUM: MSR/CPUID reconciliation insert: 0x0000010b IA32_FLUSH_CMD
00:00:05.552742 CPUM: SetGuestCpuIdFeature: Enabled PAE
00:00:05.552776 CPUM: SetGuestCpuIdFeature: Enabled SYSENTER/EXIT
00:00:05.552785 CPUM: SetGuestCpuIdFeature: Enabled SYSCALL/RET
00:00:05.552792 CPUM: SetGuestCpuIdFeature: Enabled PAE
00:00:05.552798 CPUM: SetGuestCpuIdFeature: Enabled LONG MODE
00:00:05.552804 CPUM: SetGuestCpuIdFeature: Enabled LAHF/SAHF
00:00:05.552811 CPUM: SetGuestCpuIdFeature: Enabled NX
00:00:05.554463 VMSetError: F:\tinderbox\win-6.0\src\VBox\VMM\VMMR3\NEMR3Native-win.cpp(1463) int __cdecl nemR3NativeInitAfterCPUM(struct VM *); rc=VERR_NEM_VM_CREATE_FAILED
00:00:05.554818 VMSetError: Call to WHvSetupPartition failed: ERROR_SUCCESS (Last=0xc000000d/87)
00:00:05.554898 NEM: Destroying partition 00000000011826a0 with its 0 VCpus...
00:00:05.710343 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={872da645-4a9b-1727-bee2-5585105b9eed} aComponent={ConsoleWrap} aText={Call to WHvSetupPartition failed: ERROR_SUCCESS (Last=0xc000000d/87) (VERR_NEM_VM_CREATE_FAILED)}, preserve=false aResultDetail=-6805
00:00:05.711031 Console: Machine state changed to 'PoweredOff'
00:00:05.730884 Power up failed (vrc=VERR_NEM_VM_CREATE_FAILED, rc=E_FAIL (0X80004005))
00:00:06.230907 GUI: UIMachineViewNormal::resendSizeHint: Restoring guest size-hint for screen 0 to 1400x1050
00:00:06.230961 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
00:00:06.231185 GUI: Aborting startup due to power up progress issue detected...

[Socratis]

@Stanzilla,

You posted in the "Windows Pre-releases" thread in the forums: ​VERR_NEM_VM_CREATE_FAILED with Win10 10.0.18362 (#18536). A thread which is pointing to a very specific ticket, ticket #18536. Can you explain to me why you posted on a different ticket? One that has absolutely nothing to do with your problem?

Please choose carefully where you post your information. I already replied to you in the forums, let's continue over there...