Here is a site I found when I was stumped by a missing DLL message.
DLL stands for Dynamic Link Library, and it is a file containing a library of executable functions or data required to run a programme.
But you do not need to worry about that. Take a look at www.dll-files.com
Just note down the name of the missing file from the error message, plug it into the search box on this site, then download and follow the instructions for installation. It could not be simpler.