Never happened before but appeared today, when i use Ctrl + Alt+ Del my PC shows me a blackscreen instead of the usual bar. Nothing happens so i restart the PC and it works with no problem but when i start google and play games or something and use Ctr + Alt + Del it shows me a black sceen, i wait nothing happens and restart the PC again. Happened a few times. When i did Ctrl + Alt + Del on purpose without any apps running it worked well. is maybe cause of a system overload or something? (sorry for bad EN im not a native speaker)