Mission is not given face-to-face conversation (STALKER: Call of Pripyat)

Install the patch.

Which. And the game seems to be patched to the maximum.

Do you have a license?

Alternatively, load an earlier save (save).

It seems not a license

Most likely because of the problem.

But before that there was no one

This is also a problem, I go into the office of this warrior and then the black screen becomes, although the world around me can be heard, as well as the voices of the soldiers. What is the problem? Game version 1.6.00, not a license, although I have had a disc with this game before several times without such lags.
If you patch, what about the zone overlord of version 1.6.02? And if the patches are installed again, the game will go through?
Once I played this game, I just wanted to drive freeplay, like I did all the fateful quests.

install patch 1602