[Tex/LaTex] Compilation problem with miktex 2.9 on windows 8.1

Question

I install MikTeX 2.9 on my Windows 8.1 but compilation always fails.
Which version of MikTeX is compatible with Windows 8.1?

when i launch a document compilation, i always have the error message below

Answer 1

It looks like the pdflatex executable is not found. You need to configure your LaTeX editor and tell it where MikTeX is installed, or add MikTeX to the PATH variable.

Here's a toturial on how to add MikTeX to your PATH variable. It should also work for the non-portable version of MikTeX.