Thanks for replying, I should say this first time:
it is RIS bulit computer (Remote installtion services). Everything was ok before (when normally installed). The problem is for all usb ports: windows doesn't even load, it shows Windows logo for a moment and then restarts. And i must say, that this problem doesn't appear every time, let's say every 2 of 3 times when installing form RIS server, therefore i don't think, taht the image is wrong. Sorry if this question should be placed somewhere else, i thought that this is the best place.