I replaced my old broken HDD and after I installed Windows 10 and checked if the computer worked correctly,I stumble upon an issue when I want to turn it off.It just doesn't want to.My HDD keeps spinning but my monitor doesn't detect any video output but even after 5 minutes the HDD would still spin, I can only turn it off by pulling off the PSU cable. I just don't know what to do and I am really worried, any help?