Version of Windows 8.1 for Asus Vivo

Dear Friends,

I purchased windows based Asus 8.1 Vivo. I upgraded the windows to windows 10. Due to this, the battery live reduced to 50%. Unfortunately I deleted the old windows folder too. Now there is no way to restore the windows 8.1(32 bit).

After searching on Google, I found that all the branded devices are loaded with Windows 8.1 (32 bit) with Bing. This version is not available for download. This device is out of north America, so not getting the help from local Asus service center.

Can someone please suggest which version of windows 8.1 is equivalent to windows 8.1 with Bing. One of the blog suggest windows 8.1 with single language.

Is here any way to get/download Windows 8.1 with Bing? If yes, please share link.

I request you to please help me fixing this issue.

Regards,
Niraj