Sometimes, the application or system requires some .dll .sys or other system file that is by default in all editions of Windows. But it's not your case somehow. Below I will tell you where to safely find and download files.
This is autotranslated version of this post.
Winbindex search engine for system files of Windows. Like .exe, .dll .sys and so on. It explains what the file is and will help download it from the official servers.
The service only supports files for Windows 10, so older versions of the OS you will not find anything. In search you can select different versions of the file.
When clicking on search results displays summary information of the selected file. Among these is the SHA hash of the file, a version of Windows 10, link Windows Update, the file version, and so on.
When you click on Show you can see the file and Download starts download.