Open an
Elevated Command Prompt, type
bcdedit /set {current} locale en-US
(providing your Windows 7 version is English - if not replace
en-US with your locale such as ja-JP, de-DE, es-ES, pt-BR, zh-CN, zh-TW, fr-FR, fi-FI and etc.)
Reboot to see if the animation returns. If not, return to Command Line to type:
bcdboot %WinDir% /l en-US
Reboot again.
If this fails try upgrading your display adapter
driver, or reinstall it in Device Manager by clicking the Uninstall button then restarting.
Next check for newer BIOS version Update.
There are cases where this problem has defied all known solutions requiring clean
Reinstalling Windows 7