I am using VirtualBox 4.1.2 for Windows hosts
Here is the configuration used for the virtual machine:
When I start the virtual machine some files are loaded and there is a progress-bar
Loading Files... then after it is finished there is a black screen for some 30 or 35 seconds.
Then comes the splash screen
Windows Developer Preview which is displayed again for some 30 or 35 seconds.
After that there is a blinking message which says
Your computer needs restart
Please hold the power button
...some values in Hexadecimal...
It blinks for some time then comes to a halt.
Here is a screenshot.
How do I get it to work?
Where is the problem?
Is it some problem with the RAM alloted to Windows 8 Developer Preview?
I am using this guide for reference.
Edit: Another guide which can be used for reference.