my name is antonio matosevic.i'm from croatia and i have a problem.last few days my laptop is having some difficulties.i start him normally,but he freezes after.sometimes it's within first minute and sometimes it happens after an hour.it's like i turned off his screen.i turn him off(long-press on off button).i restart him and nothing happens.so i turn it off and wait for half an hour and start it normally like nothing's happened.please,tell me what could be the cause and solution to this problem?thank you!