Windows 8 and Acceleration tab

[perplexed]

Hello. I have problem with already many versions Virtualbox on Windows 8 Enterprise x64. I thank that it will be repear but already version 4.2 is released and bug stay.

Acceleration tab in VirtualBox is not available.

My computer is HP 630 with i3 370M. VT-x is enabled in BIOS. I have two OS on HDD - Windows 7 Ultimate x64 too and I have not problems in Windows 7 with acceleration: all works fine. And Im using Hyper-V in Windows 8 without problems too.

I tried to reinstall virtualbox and to remove profile-folder of VirtulalBox (in Users folder of Win) but Acceleration tab still not available.

Do you have ideas? Thank you.

[perplexed]

Coreinfo:

Coreinfo v3.05 - Dump information on system CPU and memory topology
Copyright (C) 2008-2012 Mark Russinovich
Sysinternals -

Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz
Intel64 Family 6 Model 37 Stepping 5, GenuineIntel
HTT * Hyperthreading enabled
HYPERVISOR * Hypervisor is present
VMX - Supports Intel hardware-assisted virtualization
SVM - Supports AMD hardware-assisted virtualization
EM64T * Supports 64-bit mode

SMX - Supports Intel trusted execution
SKINIT - Supports AMD SKINIT
EIST * Supports Enhanced Intel Speedstep

NX * Supports no-execute page protection
PAGE1GB - Supports 1 GB large pages
PAE * Supports > 32-bit physical addresses
PAT * Supports Page Attribute Table
PSE * Supports 4 MB pages
PSE36 * Supports > 32-bit address 4 MB pages
PGE * Supports global bit in page tables
SS * Supports bus snooping for cache operations
VME * Supports Virtual-8086 mode

FPU * Implements i387 floating point instructions
MMX * Supports MMX instruction set
MMXEXT - Implements AMD MMX extensions
3DNOW - Supports 3DNow! instructions
3DNOWEXT - Supports 3DNow! extension instructions
SSE * Supports Streaming SIMD Extensions
SSE2 * Supports Streaming SIMD Extensions 2
SSE3 * Supports Streaming SIMD Extensions 3
SSSE3 * Supports Supplemental SIMD Extensions 3
SSE4.1 * Supports Streaming SIMD Extensions 4.1
SSE4.2 * Supports Streaming SIMD Extensions 4.2

AES - Supports AES extensions
AVX - Supports AVX intruction extensions
FMA - Supports FMA extensions using YMM state
MSR * Implements RDMSR/WRMSR instructions
MTTR * Supports Memory Type Range Registers
XSAVE - Supports XSAVE/XRSTOR instructions
OSXSAVE - Supports XSETBV/XGETBV instructions

CMOV * Supports CMOVcc instruction
CLFSH * Supports CLFLUSH instruction
CX8 * Supports compare and exchange 8-byte instructions
CX16 * Supprots CMPXCHG16B instruction
DCA - Supports prefetch from memory-mapped device
F16C - Supports half-precision instruction
FXSR * Supports FXSAVE/FXSTOR instructions
FFXSR - Supports optimized FXSAVE/FSRSTOR instruction
MONITOR - Supports MONITOR and MWAIT instructions
MOVBE - Supports MOVBE instruction
PCLULDQ - Supports PCLMULDQ instruction
POPCNT * Supports POPCNT instruction
SEP * Supports fast system call instructions

DE * Supports I/O breakpoints including CR4.DE
DTES64 - Can write history of 64-bit branch addresses
DS - Implements memory-resident debug buffer
DS-CPL - Supports Debug Store feature with CPL
PCID - Supports PCIDs and settable CR4.PCIDE
PDCM - Supports Performance Capabilities MSR
RDTSCP * Supports RDTSCP instruction
TSC * Supports RDTSC instruction
TSC-DEADLINE - Local APIC supports one-shot deadline timer
TSC-INVARIANT * TSC runs at constant rate
xTPR * Supports disabling task priority messages

ACPI * Implements MSR for power management
TM * Implements thermal monitor circuitry
TM2 * Implements Thermal Monitor 2 control
APIC * Implements software-accessible local APIC
x2APIC - Supports x2APIC

CNXT-ID - L1 data cache mode adaptive or BIOS

MCE * Supports Machine Check, INT18 and CR4.MCE
MCA * Implements Machine Check Architecture
PBE * Supports use of FERR#/PBE# pin

PSN - Implements 96-bit processor serial number

Logical to Physical Processor Map:
**-- Physical Processor 0 (Hyperthreaded)
--** Physical Processor 1 (Hyperthreaded)

Logical Processor to Socket Map:
**** Socket 0

Logical Processor to NUMA Node Map:
**** NUMA Node 0

Logical Processor to Cache Map:
**-- Data Cache 0, Level 1, 32 KB, Assoc 8, LineSize 64
**-- Instruction Cache 0, Level 1, 32 KB, Assoc 4, LineSize 64
**-- Unified Cache 0, Level 2, 256 KB, Assoc 8, LineSize 64
**** Unified Cache 1, Level 3, 3 MB, Assoc 12, LineSize 64
--** Data Cache 1, Level 1, 32 KB, Assoc 8, LineSize 64
--** Instruction Cache 1, Level 1, 32 KB, Assoc 4, LineSize 64
--** Unified Cache 2, Level 2, 256 KB, Assoc 8, LineSize 64

Logical Processor to Group Map:
**** Group 0

[perplexed]

Hello! I removed Hyper-V feature from Programs and Features -> Turn Windows features on or off and Acceleration tab in VirtualBox is enabled now!!

[Björn König]

Hello! I removed Hyper-V feature from Programs and Features -> Turn Windows features on or off and Acceleration tab in VirtualBox is enabled now!!

You already found the solution yourself, but let me explain. Hyper-V uses the virtualization extensions of your processor and you can't share them with other virtualization software like VirtualBox. In order to use VirtualBox you need to temporarily disable or permanentely deinstall Hyper-V.

Off-topic and for your information: If you consider to use Hyper-V while VirtualBox is installed then you will notice networking problems. This is because the Hyper-V Extensible Switch conficts with the VirtualBox Bridged Networking Driver. Disable the latter in the properties page of the network bridge.