I did't play any games. I changed several items in setup. I have restarted to defailt, and disable poer management. Today look like it is ok.
BUT, now I run into bigger problems. I have installed one book and after that screen is totaly empty and there is only "11skin/l/string..." on the bottom of screen is shown. I have deleted that book, but no help.
Reader is visible in windows, and in Sony application.
I have reversed to original firmware with "Uninstaller_600", all goes ok, but reader still can't boot, and same sentence is on the screen ! :(
HELP....