How to solve the virtualbox installation win10 appears flower screen problem

Want to experience the latest version of Win10 but don't want to install it in a physical machine, a virtual machine is the best choice. VirtualBox is one of the most popular virtual machine software. Recently, Windows 10 preview version 10565 was installed in Virtual. After the start menu was opened, the screen appeared, and the dynamic tile could not be rendered correctly. As shown below:

The reason for this problem may be that the rendering of the dynamic tile is not compatible with the virtual machine's 2D Video and 3D acceleration. At this point, you can try to close the VirtualBox related options to solve:

First shut down the virtual machine, open the settings (virtual machine properties), and then in the “display” settings, “Open 3D Acceleration” and “Open 2D Video Acceleration” is disabled, as shown below: