VT-x/AMD-V hardware is not accessible?

[Milkshakes28]

I recently wanted to use virtualbox and I have used it for a long time, but for some reason (even if I updated) it gives me this error message :VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.

Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer.


If you want to log here it is:

VirtualBox COM Server 4.2.6 r82870 win.amd64 (Dec 19 2012 14:42:41) release log
00:00:00.187000 main Log opened 2013-01-14T02:57:45.008800000Z
00:00:00.187000 main OS Product: Windows 7
00:00:00.187000 main OS Release: 6.1.7600
00:00:00.187000 main OS Service Pack:
00:00:00.281000 main DMI Product Name: To Be Filled By O.E.M.
00:00:00.297000 main DMI Product Version: To Be Filled By O.E.M.
00:00:00.297000 main Host RAM: 6143MB total, 4608MB available
00:00:00.297000 main Executable: D:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.297000 main Process ID: 5664
00:00:00.297000 main Package type: WINDOWS_64BITS_GENERIC
00:00:00.328000 Loading settings file "D:\Users\Wade/.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:02.683000 VDInit finished
00:00:02.808000 Loading settings file "D:\Users\Wade\VirtualBox VMs\LXDE\LXDE.vbox" with version "1.12-windows"
00:00:02.855000 Loading settings file "D:\Users\Wade\VirtualBox VMs\mac\mac.vbox" with version "1.12-windows"
00:00:08.924000 ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
00:00:10.265000 ERROR [COM]: aRC=VBOX_E_IPRT_ERROR (0x80bb0005) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={SessionMachine} aText={Saved screenshot data is not available (VERR_NOT_SUPPORTED)}, preserve=false
00:00:38.595000 ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
00:00:39.952000 ERROR [COM]: aRC=VBOX_E_IPRT_ERROR (0x80bb0005) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={SessionMachine} aText={Saved screenshot data is not available (VERR_NOT_SUPPORTED)}, preserve=false
00:04:26.793000 ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
00:04:28.150000 ERROR [COM]: aRC=VBOX_E_IPRT_ERROR (0x80bb0005) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={SessionMachine} aText={Saved screenshot data is not available (VERR_NOT_SUPPORTED)}, preserve=false

I have disabled and enabled the virtual machine thing in the bios and I have updated virtual box I haven't updated my bios though. I am not sure what the bios version is but I know the company who made it.

[noteirak]

No much more can be said - you must enable Virtualization in your BIOS.
Also, make sure no other product is locking the Virtualization feature - VMware, etc..

[Milkshakes28]

I have disable and enabled it 30 times already, also I don't have any other VM ware running on my computer.I did at one point enable hyper-v and tried that but it didn't work so I disabled it. I also have 3 operating systems does this effect it?

[mpack]

You probably still have the hyper-v service running in the background. It's up to you to fix this since only you have access to your PC for a close check of the process list, and only you know what software you installed.

ps. In future please post logs in complete form as .zip attachments. Do not paste text, and certainly don't paste extracts.