virtualbox.org

Hello, I wan't to ask why I don't have a x64 bits in Virtual Box 4.0.10 (the latest have a very f***ing lag).
Before I have, but now I don't have ?!
I was searching in this forum, but I can't find VBox.log ..

Sorry, for my bad English..

1) 64-bit guests need hardware-virtualzation enabled in the hosts bios.
2) when creating the 64-bit guest you must select 64-bit in General -> Basic -> version.
3) If running Windows as host you must make sure hyper-v or xp mode is not enabled on the host. MS does not play well and wants it all.