virtualbox w8.1 64bit 32GB and only 32bit OS host,why

Hi
i installed the last virtualbox VirtualBox-4.3.10-93012-Win under w8.1 pro 64bit
and i noticed that only can be virtualized 32bit hosts

so i uninstalled it and installed VirtualBox-4.3.8-92456-Win , and same
can virtualize only 32bit operation system

what's wrong?

thanks

 

Check out if you CPU supports VT-x (Virtualization): http://ark.intel.com/products/virtualizationtechnology. If it does, than check in BIOS if you have it enabled.

hqsec

 

yes my cpu support it
maybe it's the last version for windows 8.1

 

Do you have 64 bit guest OS already installed and can't run it after VB update. Did you check in BIOS if virtualization is enabled? I will test latest version on my Windows 8.1 and see if I have the same problem.

hqsec

 

no
i have in the list only 32bit os

 

I just installed 64 bit Elementary OS on latest version of Virtualbox (on Windows 8.1 x64) with no problems. I would guess that you have virtualization disabled. Check your BIOS settings.

hqsec

 

about bios , i have an asus and intel virtalizaion techology is on

 

I don't know what else could be a problem. I have the same VirtualBox limitation on my laptop that doesn't support VT-x.

hqsec

 

do you know i notice that virtual box uninstaller leaves the drivers , maybe too many updates mess up it
is there a tool to maka a clean install

 

You can use instructions on this site to remove them: http://dottech.org/101997/how-to-uninstall-virtualbox-drivers-on-windows/.

hqsec

 

thanks
by the way they could develop a cleaner tool to do it
i track with revo pro , and there so many keys left

i will check the bios later and try it again

 

hi
thanks
i found 2 settings in the bios
enabled , saved and i was able to virtualize 64bit
i tried with osx montain lion but nothing

 

I've never tried to install OSX, so I can't help you with this problem. Maybe somebody else has more experience and will jump in.

hqsec