Setting > General > Version Windows 8.1 64bit isn't there

[GeorgesLurk]

I need to install windows 7 or 8.1 but i can't install any 64bit guess OS, the choice just dosen't show up. If i choose other and other, or 32bit it dosen't work.
(I'm being late on my contract and it's stressing me alot)

[socratis]

A quick search shows plenty of potential solutions. It's worth a try...

[GeorgesLurk]

site:forums.virtualbox on google search, clever i'll use that someday.
The 64 bit version of Windows 8.1 dosen't appear as choice when creatng a new VM.
Is it because either VT-x or AMD-V is disabled somewhere?

[socratis]

• 64-bit guests need hardware virtualization enabled in the host's BIOS (which means that you have to enable VT-x/AMD-V in your BIOS). Look at your user-manual for your specific model on how to do this.
• If another virtualization program is running and not "cooperating" you must disable it or uninstall it (see example below).
• If running Windows as host you must make sure "Hyper-V" or "XP-mode" is not enabled on the host.