Hello, I have installed Windows 10 (64-bit) Education. I got the original key and I was able to download the iso from the Microsoft website, so I did, but after a clean installation, some programs refuse to fire errors like: "Could not continue executing the code because the mss32.dll object was not found." As an example, I can mention several such files as SpeedTreeRT.dll, d3dx9_26.dll, xinput1_3.dll, x3DAudio1_7.dll. I read a bit about it and read that you should install Microsoft Visual C ++, Direct X and Net Framework libraries, but after installing the latest versions of these programs it was still the same, the question now is what versions to install and how to fix these errors with libraries.
Installing the latest Microsoft Visual C ++, Direct X and Net Framework packages will not bring you much, because win 10 is a new distribution, and besides, you probably install some older versions of the application. So you will need older versions of the libraries.
Visual C ++ redistributables do not supersede each other. Some apps may be very specific to bind to the exact version of the Visual C ++ dlls, for example, to make sure the app runs exactly as published. Most apps, however, bind to the latest edition of the same major version, as it is the default behavior and can benefit from Microsoft's security updates.
There could be multiple versions of Visual C ++ redistributables required by one app. For example, if an app depending on Visual C ++ 2008 redistributable uses a component depending on Visual C ++ 2005 redistributable, the app's developer must ship both versions of Visual C ++ redistributables.
I think your best bet is to install DirectX End-User Runtimes (June 2010). It is on this page https://www.microsoft.com/en-us/download/details.aspx?id=8109 If the system resists, set the compatibility mode with the older version of windows. I don't have Win 10 and I don't know how it will work.
First of all, when you install a new program, a correctly created installer should inform you about the lack of appropriate components and give you the opportunity to install them, or at least give their version.
Thanks for your help, but the problem is solved by reinstalling the system on Windows 7. The newer system is apparently not for me, I always have problems with it.