This is normal. According to your screenshot, you have installed 360 anti-virus software. Starting from Windows 8, as long as you install anti-virus software, Windows Defender will automatically turn off. Even if you start it manually, something will go wrong. Just leave it alone. Anti-virus software cannot coexist with the system's own software in Windows 8 and 8.1. So it will automatically close.
Is it normal to not have a boyfriend?