libgmp-10.dll is missing

Have you tried adding C:\MinGW\bin as a System variable Path (not PATH) in Settings->System Properties->Environment Variables?

I saw this solution on this page: Missing libgmp-10.dll

Go to the mingw download page and browse the following directories:

MinGW / Base / gmp / gmp-5.0.1-1

Currently you end up with the following link:
http://sourceforge.net/projects/mingw/files/MinGW/Base/gmp/gmp-5.0.1-1/libgmp-5.0.1-1-mingw32-dll-10.tar.lzma/download
and it contains the needed file.

I know there are automated methods for installing mingw gcc, but when one uses single mingw packages, then gmp is one of obligatory downloads.