The default boot animation for Windows 7 is that four-color balls are rotated and assembled into windows, but some users will experience a green scroll bar instead of an animation when Win7 boot. If you encounter this problem, you can refer to the official solution given by Microsoft. Microsoft explained that due to technical limitations, the default resolution for Windows 7 is 1024x768.
During the boot process, because the video card driver has not yet been loaded, these animations are done by the CPU, which completes the graphical display by updating the buffer. Therefore, if the monitor resolution is below 1024x768, or the CPU is too poor, it is possible to run the boot animation. In addition, the system language is set incorrectly or some improper optimizations are used to cause this problem.
1, if it is a hardware reason, then you need to consider the replacement of the relevant parts.
2, if the hardware support, then you can see the system language Settings error, and fix the error.
-Find "Attachment" in "Start-> All Programs". Right-click the command prompt and select Run as Administrator.
-Type bcdedit in the command window, and then press ENTER. Check to see if the Windows Boot Manager and Windows boot loader locale correspond to the language of the Windows 7 system.
-If inconsistent, type the following command in the command window to modify:
(Note: Xx-xx represents the language.) such as: China ZH-CN)
-Restart the computer to take effect.
-If the boot animation is still not present, try to use the installation CD to repair the boot animation using the Repair option.