so i booted my pc for the first time without a hardrive and i got bios and everything and then i got a hardrive and hooked it up and downloaded windows on a usb and plugged them both in and booted windows from the start menu and i kept getting errors so i unplugged the hard drive and plugged it back in and now i dont get picture at all on my monitor and it keeps going through the boot windows error blue screen and re booting itself (dosnt show this but can tell its happening) and my pc wont power down anymore like i have to force shutdown. please help