I downloaded the current pre-built boost library files, but am having some difficulty with them. I am building a VC8.0 (Visual Studio 2005) application that is making use of boost::program_options and boost::filesystem. My application links fine, but when I try to execute the program, I get an error message about a missing "MSVCP80D.dll" (or "MSVCP80.dll" when building for release). I don't have those .dlls on my machine. I tried reinstalling Visual Studio, but that did not work. I found the needed .dll files online and downloaded them. After installing the .dll files, I got another error about another missing .dll which I also downloaded. Next error message received is "This application has failed to start because the application configuration is incorrect. Review the manifest file for possible errors. Reinstalling the application may fix this problem. For more details, please see the application event log." A couple of other notes: The application I am trying to build was previously successfully built by a couple of other engineers here (I think using 1.33.x and/or 1.34.x). I am trying to replicate their work using the current libraries. One of the guys does not work here and the other got a new PC and somehow lost his ability to build the project.