So, I recently (a month ago) built my own pc, it worked well, but now i cannot turn it off, it works perfectly when is on, but when i press "shut down", windows says that it's turning off, then i got a black screen, monitor says that it has lost it's signal(like always when i turn my pc off), but my pc keeps running, i mean - fans are spinning, all the lights are on, but it doesn't turn off until i press the button on the case for 5sec. What can i do? No new updates have been installed, i checked, no windows updates are available, i scanned sfc/scannow, nothing was found, i turned pc off with the button, turned the psu button off(coolermaster masterwatt 650w), unpluged the power cabble for 15sec and tried to do it again, didn't work. Can anyone please help me?