Here in this page, you can download full package of Asus Android USB driver package for Windows XP, Vista, 7, 8, 8.1, and 10 either 32-bit or 64-bit from a resume-able direct link mirrored in our server. This the official build of USB driver software for Windows computer to properly detect and recognize any Asus Android devices including smartphones (all Zenfone variants) and tablets. However, the package has no installer file which means you have to extract the content and install it manually from Windows Device Manager.
We mirrored the file directly from Asus server and hence the file is untouched and unaltered. Nevertheless, you may better to scan it using your favorite antivirus software.