问题描述：
VirtualBox kernel driver not installed. The vboxdrv kernel module was either not loaded or /dev/vboxdrv was not created for some reason. Please install the virtualbox-ose-modules package for your kernel and execute '/etc/init.d/vboxdrv start' as root.
VBox status code： -1908 （VERR_VM_DRIVER_NOT_INSTALLED）。
Result Code：
0x80004005
Component：
Console
Interface：
IConsole {1dea5c4b-0753-4193-b909-22330f64ec45} [bitsCN_com]

解决办法：
sudo apt-get install virtualbox-ose-source
安装模块源码然后
cd /usr/src
解压源码
sudo tar xjvf virtualbox*.bz2
cd modules/virtualbox-ose
sudo ./build_in_tmp install
让他编译安装模块驱动
完成后
xiaoxu@xiaoxu：/usr/src/modules/virtualbox-ose$ sudo /etc/init.d/vboxdrv start
* Starting VirtualBox kernel module vboxdrv [ OK ]
就可以看到加载成功了，启动virtualbox也没有问题了。

问题二：启动提示The VirtualBox kernel driver is not accessible to the current user.
问题描述：
The VirtualBox kernel driver is not accessible to the current user. Make sure that the user has write permissions for /dev/vboxdrv by adding them to the vboxusers groups. You will need to logout for the change to take effect..
VBox status code: -1909 (VERR_VM_DRIVER_NOT_ACCESSIBLE).
Result Code:0x80004005
解决办法：
sudo chmod ugo+rw /dev/vboxdrv
或者  
解决的方法：
sudo chmod 777 /dev/vboxdrv
然后，VIrtualBox就能正常启动啦。