I did my CV by using Texmaker on a PC; when I open the file on another PC it does not work, in particular the software gives me the following messages (I downloaded and updated MikTek as well):
%----------------------------------------------------------------------------------------
% PACKAGES AND OTHER DOCUMENT CONFIGURATIONS
%----------------------------------------------------------------------------------------
\documentclass[11pt,a4paper,sans]{moderncv} % Font sizes: 10, 11, or 12; paper sizes: a4paper, letterpaper, a5paper, legalpaper, executivepaper or landscape; font families: sans or roman
% moderncv contiene anche i simboli del telefono, dell'email ecc
\moderncvstyle{classic} % CV theme - options include: 'casual' (default), 'classic', 'oldstyle' and 'banking'
% L'opzione classic permette di inserire le informazioni personali (data di nascita, indirizzo, telefono, email) in alto a destr, accanto alla foto.
\moderncvcolor{blue} % CV color - options include: 'blue' (default), 'orange', 'green', 'red', 'purple', 'grey' and 'black'
%\usepackage{lipsum} % Used for inserting dummy 'Lorem ipsum' text into the template
\usepackage[scale=0.75]{geometry} % Reduce document margins
%\setlength{\hintscolumnwidth}{3cm} % Uncomment to change the width of the dates column
%\setlength{\makecvtitlenamewidth}{10cm} % For the 'classic' style, uncomment to adjust the width of the space allocated to your name
\newsavebox{\skypeicon}
\savebox{\skypeicon}{\includegraphics[height=.8\baselineskip]{skypefig}}
\newcommand{\skypesocialsymbol}{\usebox{\skypeicon}}
% Questo blocco di istruzioni serve per inserire il simbolo di Skype
\usepackage{xspace}
\newcommand{\MATLAB}{\textsc{Matlab}\xspace}
% Questo blocco di istruzioni serve per inserire il simbolo di MATLAB
%----------------------------------------------------------------------------------------
% NAME AND CONTACT INFORMATION SECTION
%----------------------------------------------------------------------------------------
\firstname{G} % Your first name
\familyname{A} % Your last name
%----------------------------------------------------------------------------------------
\begin{document}
%----------------------------------------------------------------------------------------
% CURRICULUM VITAE
%----------------------------------------------------------------------------------------
\makecvtitle % Print the CV title
%----------------------------------------------------------------------------------------
% CAMPI DI INTERESSE
%----------------------------------------------------------------------------------------
\section{Occupational Field}
\cvitem{}{
Academic and research field
}
%----------------------------------------------------------------------------------------
% EDUCATION SECTION
%----------------------------------------------------------------------------------------
\section{Education and Training}
\cventry{}{Master's degree in robotics and automation engineering}{(in progress), University of Pisa}{Pisa (PI), Italy}{}
{
\begin{itemize}
\item Extracurricular exam: biomechanics of human motion (bionics engineering)
\end{itemize}
}
{}
\cventry{}{Bachelor's degree in biomedical engineering (industrial curriculum)}{University of Pisa}{Pisa (PI), Italy}{\textit{1}}
{
\begin{itemize}
\item Thesis: Reconfigurable electrochemical biosensor; it can be used in three different measurements modes (amperometric, potentiometric, electrochemical impedance spectroscopy)
\end{itemize}
}{}
\cventry{}{High school diploma (classical studies)}{Liceo Classico}{Italy}{\textit{1}}
{
%\begin{itemize}
%\item Tesi: La Natura.
%\item Materie: Latino, Greco, Inglese, Biologia, Chimica, Scienze Naturali, Fisica, Matematica, Storia, Geografia, Italiano.
%\end{itemize}
}{}
%----------------------------------------------------------------------------------------
% COMPUTER SKILLS SECTION
%----------------------------------------------------------------------------------------
\newpage % vado in una nuova pagina, altrimenti a pag 1 compare solo "Competenze informatiche" ed il resto è a pag 2
\section{Computer Skills}
\cvitem{}{C++, Atmel ATXMEGA256A3BU Microcontroller and Atmel Studio, LTspice, \MATLAB, Wolfram Mathematica, COMSOL Multiphysics (Structural Mechanics Module, Fluid Dynamics Module, Heat Transfer Module, Deformed Mesh Module, Material Library, Fluid-Structure Interaction), \LaTeX, Microsoft Windows, Microsoft Office.}
\end{document}
How can I solve these problems? If you need all the files I put them here.
Thank you so much.

fontawesomeand\faSkypefor the skype icon as already mentioned in my answer https://tex.stackexchange.com/a/485923/16550 ? – Mensch Jul 19 '19 at 21:12