Kodak z981 problem during pic transfer

[NikolaS93]

I am having problem with my camera during transfering pictures from camera to my PC. When I try to transfer a large amount of pictures (in .RAW or .JPG) in the middle of the process (it is never known when) camera turns off by it's self. The battery is full. In that situation I have to disconnect camera and again connect and turn it on and find manualy which picture is next for transfer.
On the other hand, I can transfer pictures "5 by 5" and it works for some time and than again it turns off.
This is the message which shows me Windows when this happens:

http://www.dodaj.rs/f/1O/AX/2lpfjUmm/capture.jpg

The USB port is 100% OK.
I am using Windows 7 Ultimate 32bit.

Is there any solution for my problem?