请教各位大神，为什么我的virtualbox不能安装64位的系统啊，没有64位的选项，检测了cpu支持虚化并已经开启，win8的系统，hyper-V的服务也都停了，但还是没有……

https://www.virtualbox.org/wiki/Bugtracker
https://forums.virtualbox.org

Eventually post a thread on the official forum so the developers can see your problem. If you don’t post the thread , the developers never see the bug .
There’re many people around the world using VirtualBox , not only you using it . That means other people maybe have the same problem.