ubuntu Kernel panic while installing CentOS 7 in VirtualBox

I have a laptop with Xubuntu desktop 14.10 , and I installed VirtualBox and updated it to the latest version . I'm trying to install CentOS 7 (source downloaded from the official site) as a VM, but each time I begin the installation the laptop itself suffers from a kernel panic. I wonder how a VM will kernel panic the laptop, and I want to know how to solve this issue. - The iso I use is CentOS-7.0-1406-x86_64-Everything.iso - The version of VirtualBox is 4.3.18.r96516 - Laptop model: Dell E6430 - VM Settings - Crash photo uname -a Linux Laptop 3.16.0-25-generic #33-Ubuntu SMP Tue Nov 4 12:06:54 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux