If your program can’t start because the DLL file is missing from your computer try reinstalling the program to fix the problem and if you won’t be able to open the program the simple reason in DLL file is the property of Microsoft so third party site cant offer them you can find plenty of sites and download on your computer however some sites do offer DLL files without any malicious racks
Read more:- https://getassist.net/installing-dll-files-on-windows/