how to enter bold-backslash in latex?

I am using beamer making a presentation, I want to add a bold backslash inside a text, \textbf{\textbackslash} does not seem to work, can someone tell me please how to enter a bold-backslash? the code is something like this:

\documentclass[xcolor=dvipsnames]{beamer}
\usecolortheme{beaver}

\begin{document}

\begin{frame}{Differences in File-systems}
\begin{itemize}
\item (backslash) {\color{red}{\textbf{\textbackslash}}} in windows:\\ \vspace{5 mm}
\textbf{c:\textbackslash Documents and Settings\textbackslash Maria\textbackslash My Documents\textbackslash lec-1.doc}\vspace{5mm}
\item (forward slash) \textbf{{\color{red}{/}}} in linux: \\ \vspace{5 mm}
\end{itemize}
\end{frame}

\end{document}

• \documentclass{article} \begin{document} \textbf{\textbackslash} \textbackslash \end{document} works for me → i.stack.imgur.com/dTkl2.png – user11232 Feb 8 '15 at 11:42
• thanks, @Harish. what you have suggested will enter two backslashes like this (\), the \textbf{} is not working for \textbackslash – Maria Feb 8 '15 at 11:49
• The second one is for comparison, The first one is bold compared to second in my picture. – user11232 Feb 8 '15 at 11:50
• Welcome to TeX.SX! Please make your code compilable (if possible), or at least complete it with \documentclass{...}, the required \usepackage's, \begin{document}, and \end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. – Martin Schröder Feb 8 '15 at 11:55
• Kind of you @Martin, I edited the question to make it more clear, Thanks. – Maria Feb 8 '15 at 13:10

Your question is very unclear but I assume from the tag you are using beamer.

\documentclass{beamer}

%\usepackage[T1]{fontenc}
%\showoutput
\begin{document}
\begin{frame}
\textbf{aaa\textbackslash}

aaa \textbackslash
\end{frame}
\end{document}


Produces the warning

LaTeX Font Warning: Font shape OMS/cmss/bx/n' undefined
(Font)              for symbol textbackslash' on input line 11.


Telling you that \ comes from the math sans serif and there is no bold in OT1 encoding.

\usepackage[T1]{fontenc}

where if you look closely (or at the output from \showoutput) the \` is bold.