Unknown error when starting the game (Just Cause 2)

I had a troubleshooter, because I did not restart the computer after installation. Perhaps the joke in this. And, like it does not support XP.

If you have HP then you will not start it in any way

I have windiws 7

I also have windows 7 maximum, intel core i5 processor, Geforce GTX 780Ti video card, I start steam, downloaded Just Cause 2, I start it, and suddenly, It is impossible to start the application (Unknown error)