Hi

I can't activate the Hyper-V feature of Windows 8.1.  Whenever I enable the feature all goes well, I reboot when prompted.  But after the reboot Hyper-V is not installed - it's shown as not installed in "Turn Windows feature on and off".

The Windows Setup log has an information event (ID 11) "Update Microsoft-Hyper-V of package Microsoft-Hyper-V-ClientEdition-Package failed to be turned on. Status: 0x800f0922."

I tried DISM.exe /Online /Cleanup-Image /RestoreHealth, but that made difference.

I also tried activating the feature through DISM, but no joy.

Finally, I tried changing my SSD to a spare I had, and doing a fresh Windows 8.1 install on the new SSD, but Hyper-V still doesn't install.

I have a i7 CPU, and virtualization is enabled in the BIOS.

Roy

Did you also enable Data Execution Prevention in the BIOS? (and cold boot)

And, does your processor support SLAT?

Download this app: http://technet.microsoft.com/en-us/sysinternals/cc835722

run from an administrator command prompt:  "coreinfo -v"

What are your results?

You should see something like this if you're configured properly

D:\Downloads\Coreinfo>coreinfo -v

Coreinfo v3.31 - Dump information on system CPU and memory topology
Copyright (C) 2008-2014 Mark Russinovich
Sysinternals - www.sysinternals.com

Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Intel64 Family 6 Model 60 Stepping 3, GenuineIntel
Microcode signature: 0000001A
HYPERVISOR      -       Hypervisor is present
VMX             *       Supports Intel hardware-assisted virtualization
EPT             *       Supports Intel extended page tables (SLAT)

Did you also enable Data Execution Prevention in the BIOS? (and cold boot)

And, does your processor support SLAT?

I ran wmic OS Get DataExecutionPrevention_Available which returned TRUE,

As I understand it, all i7 processors support SLAT.

Output from Coreinfo -v:

Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
Intel64 Family 6 Model 60 Stepping 3, GenuineIntel
Microcode signature: 0000001A
HTT       * Hyperthreading enabled
HYPERVISOR - Hypervisor is present
VMX       * Supports Intel hardware-assisted virtualization
SVM       - Supports AMD hardware-assisted virtualization
X64       * Supports 64-bit mode

SMX       - Supports Intel trusted execution
SKINIT     - Supports AMD SKINIT

NX         * Supports no-execute page protection
SMEP       * Supports Supervisor Mode Execution Prevention
SMAP       - Supports Supervisor Mode Access Prevention
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
RDWRFSGSBASE * Supports direct GS/FS base access

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
SSE4a     - Supports Streaming SIMDR Extensions 4a
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
MTRR       * Supports Memory Type Range Registers
XSAVE     * Supports XSAVE/XRSTOR instructions
OSXSAVE   * Supports XSETBV/XGETBV instructions
RDRAND     * Supports RDRAND instruction
RDSEED     - Supports RDSEED instruction

CMOV       * Supports CMOVcc instruction
CLFSH     * Supports CLFLUSH instruction
CX8       * Supports compare and exchange 8-byte instructions
CX16       * Supports CMPXCHG16B instruction
BMI1       * Supports bit manipulation extensions 1
BMI2       * Supports bit manipulation extensions 2
ADX       - Supports ADCX/ADOX instructions
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
ERMSB     * Supports Enhanced REP MOVSB/STOSB
PCLMULDQ   * Supports PCLMULDQ instruction
POPCNT     * Supports POPCNT instruction
LZCNT     * Supports LZCNT instruction
SEP       * Supports fast system call instructions
LAHF-SAHF * Supports LAHF/SAHF instructions in 64-bit mode
HLE       * Supports Hardware Lock Elision instructions
RTM       * Supports Restricted Transactional Memory 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
INVPCID   * Supports INVPCID instruction
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

EIST       * Supports Enhanced Intel Speedstep
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

PREFETCHW * Supports PREFETCHW instruction

Maximum implemented CPUID leaves: 0000000D (Basic), 80000008 (Extended).

Logical to Physical Processor Map:
**------  Physical Processor 0 (Hyperthreaded)
--**----  Physical Processor 1 (Hyperthreaded)
----**--  Physical Processor 2 (Hyperthreaded)
------**  Physical Processor 3 (Hyperthreaded)

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

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

No NUMA nodes.

Logical Processor to Cache Map:
**------  Data Cache          0, Level 1,   32 KB, Assoc   8, LineSize  64
**------  Instruction Cache   0, Level 1,   32 KB, Assoc   8, LineSize  64
**------  Unified Cache       0, Level 2,  256 KB, Assoc   8, LineSize  64
********  Unified Cache       1, Level 3,    8 MB, Assoc  16, LineSize  64
--**----  Data Cache          1, Level 1,   32 KB, Assoc   8, LineSize  64
--**----  Instruction Cache   1, Level 1,   32 KB, Assoc   8, LineSize  64
--**----  Unified Cache       2, Level 2,  256 KB, Assoc   8, LineSize  64
----**--  Data Cache          2, Level 1,   32 KB, Assoc   8, LineSize  64
----**--  Instruction Cache   2, Level 1,   32 KB, Assoc   8, LineSize  64
----**--  Unified Cache       3, Level 2,  256 KB, Assoc   8, LineSize  64
------**  Data Cache          3, Level 1,   32 KB, Assoc   8, LineSize  64
------**  Instruction Cache   3, Level 1,   32 KB, Assoc   8, LineSize  64
------**  Unified Cache       4, Level 2,  256 KB, Assoc   8, LineSize  64

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

Doesn't look like you added the "-v" after coreinfo.  That's the regular output of command alone.

One thing that is missing is EPT.  Your i7 does support it, but your MB or BIOS may not, which could be the issue.

Can you run again, but add the -v switch after coreinfo?

Sorry, you're quite right I had missed the switch.

C:\Users\Roy\CoreInfo>coreinfo -v

Coreinfo v3.31 - Dump information on system CPU and memory topology
Copyright (C) 2008-2014 Mark Russinovich
Sysinternals - www.sysinternals.com

Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
Intel64 Family 6 Model 60 Stepping 3, GenuineIntel
Microcode signature: 0000001A
HYPERVISOR      -       Hypervisor is present
VMX             *       Supports Intel hardware-assisted virtualization
EPT             *       Supports Intel extended page tables (SLAT)

Hi,

Was your issue resolved?

If no, please reply and tell us the current situation in order to provide further help.

Hi Karen No, I still have the issue. Hyper-V still fails to install with the same error in the Setup event log. Initially I thought it was a file corruption, but doing a clean Windows install on a new SSD didn't resolve the issue. Suggestions here that it's a BIOS issue, but from what I can see that looks ok as well. My motherboard is a Gigabyte Z97X-Gaming 7 Intel Z9, with an Intel Core i7-4790K CPU. Thanks, Roy

Search the Hyper-V forums for your Gigabyte motherboard and you will find it mentioned frequently.  And most folks with the same problem. (for multiple years)

Ultimately, your issue is a Gigabyte issue and you need to take it up with them.

Hi Roy,

Check with Gigabyte support for BIOS updates and post back if you're ultimately able to get Hyper-V to work or not and I will update my list.

https://smudj.wordpress.com/windows-8-hyper-v-motherboard-and-oem-systems-compatibilty/

Thanks!