1.下载virtualbox的chrome os镜像。网址：http://chromeos.hexxeh.net/index.php
注意：在chrome os虚拟机的设置中，系统->处理器中要在“启用PAE/EX”前打钩。
2.关于鼠标和"没有可用的网络"问题
1)关于安装时没有鼠标及鼠标反映慢的问题.
解决方法:右Ctrl+i
2）解决在选择网络类型时，显示"没有可用的网络"问题；
在vm关闭时，点击该虚拟机设置->网络 ->高级中，连接方式设为 NAT，在高级中设置控制芯片(adapter type)为Intel PRO/1000 MT 桌面 （82540EM）点击确定，重新启动chromium即可。
详见：http://hexxeh.net/?p=328117684 这里有更多的解释。
3.其他参考网址：
1）在virtualbox中设置adatper type
http://www.storagecraft.com/support/pl/book/export/html/14454
2）virtualbox中一些网络配置
http://blog.csdn.net/jiangzhengdong/article/details/8037043
detailed steps for installation:-
1-download image
2-download virtualbox
3-install vbox
4-click add
5-next
6-give the machine a name
7-choose linux and underneath it ubuntu
8-next
9-choose ram size 2gb should be good (make sure u have enough left to run host os)
10-next
11-check start up disk and choose "use existing hard disk" then choose the downloaded file after u extract it
12-click create
13-choose settings and make sure network is on nat
14-choose the the new virtual machine and click start
15-follow the steps
and voila a new running virtual machine
note:- if mouse isn't working click cntrl+i the cntrl+i again
note:- to speed up mouse click on the clock>setting>mouse speed>max
have fun!!led steps for installation:-
1-download image
2-download virtualbox
3-install vbox
4-click add
5-next
6-give the machine a name
7-choose linux and underneath it ubuntu
8-next
9-choose ram size 2gb should be good (make sure u have enough left to run host os)
10-next
11-check start up disk and choose "use existing hard disk" then choose the downloaded file after u extract it
12-click create
13-choose settings and make sure network is on nat
14-choose the the new virtual machine and click start
15-follow the steps
and voila a new running virtual machine
note:- if mouse isn't working click cntrl+i the cntrl+i again
note:- to speed up mouse click on the clock>setting>mouse speed>max
have fun!!
posted with chromium os vbox machine :)