Cant install 64 bits guests

[secaviar]

My PC has an Intel i5-4690 cpu and is running Windows 10 64 bits.
- The CPU supports virtualisation and 64 bits
- VT-x is enabled in the BIOS
- Hyper-v is disabled in Windows
- No other app is using VT-x

But I can only install 32 bits guests.

Can you help ?

[socratis]

Can you help ?

Have you actually tried helping yourself? Like, searching the forums for this exact question? "Cant install 64 bits guests site:forums.virtualbox.org".

Here's the first link: I have a 64bit host, but can't install 64bit guests.

[secaviar]

Of course, I have read the thread "I have a 64 bithost, but can't install 64bit guests" but, unfortunately, it does not answer my problem since all the issues of the checklist are satisfied and it still does not work.

[socratis]

Of course, I have read the thread

Well, you should have mentioned that in your original post. How am I supposed to know that you actually tried it? It would have saved us a couple of posts if you had stated the situation from the beginning.

If you say that #1 (CPU supports it), and #2 (enabled in the BIOS), are satisfied then it is #3. Something is grabbing the VT-x and does not let other use it, which is not always obvious:

If (1) and (2) are already taken care of, then make sure that no other host apps are already using VT-x/AMD-v. The usual culprits are system level debuggers, other VM platforms, and some resident anti-virus applications. This has become a particular issue with 64bit Windows desktop and server hosts - especially Win8/Win2k12/Win10, since these may enable Microsoft's Hyper-v VM platform by default: this grabs ownership of VT-x and won't play nice with VirtualBox.

Are you absolutely sure you have none of the above?