General ⇒ TeXstudio textudio does not compile

[asturnebur]

Hello all,

Here is my problem with TeXstudio:

Make sure that you have installed a (La)TeX distribution e.g. MiKTeX or TeX Live, and have set the correct paths to this distribution on the command configuration page.
A (La)TeX editor like TeXstudio cannot work without the (La)TeX commands provided by such a distribution.
Error: One command expansion invalid.

Previously I have installed MiKTeX 2.9 on C:\Program Files\MiKTeX 2.9 and create a new file with one line of code to check if my code was wrong but same message. The last thing to check if I am right, is path but I don't know how. Moreover ,if path is ok, what's possible wrong?

Thanks for your time

[asturnebur]

I reinstalled again Miktex, maybe corrupted files was installed.