could not start the command pdflatex - synctex=1 -interaction=nonstopmode %.tex error

If you meet the error "Error : could not start the command" while executing TexMakerX commands in Win7 X64, it is probably due to environment path of LaTex compiler. The following steps may help you solve this error:

1. Make sure that you did install a LaTex compiler like MiKTeX. You know, TexMakerX is just a editor of latex input, not a compiler.
2. Locate the bin directory in the installation directory of the LaTex compiler.
3. Add the directory of bin like "d:\Program Files (x86)\MiKTeX 2.9\miktex\bin" to the environment paths of windows.
4. Right click computer in start menu, choose properties.
5. Find the "Advanced system settings" in upper left corner.
6. Click the button "Environment Variables".
7. Find the row of variable path in the group of "System Variables" and add bin path like";d:\Program Files (x86)\MiKTeX 2.9\miktex\bin"to the tail.
8. Remember to add a semicolon to separate different path.

Then, try it again...

I found this question on another forum and it says that you should install MiKTex for windows too. Worked like a charm !