ATTENTION:
in Russian version there is stable bug in Dark Valley in 1.5.04. The mechanic of Freedom gives you two sets of tasks:
1) find flash sticks with information about sniper rifles;
2) and portable computer of his friend.
So if you take 1st task to find flash sticks, then 2nd task for PC you can not fulfil 1st task even if you found all flash sticks - the mechanic do not have proper phrases in dialogue. To complete both tasks: take 1st task, find and bring flash sticks, then take second task and bring him PC.
I have fix by IG-2007 for this. Please find links bellow, but it is for Rus version. However it should work.
1.5.04
http://depositfiles.com/files/7888106
http://www.files.to/get/390850/doxtbl015s