A good practice when installing hardware that can reconfigure your PC is to enter deice manager in safe mode and see what it tells you that you have. People are often surprised that they have many more devices showing than they knew about. Ignore monitors, mice and keyboards. Remove all devices where there are multiples and Refresh. This can clear up many potential problems. It is possible that your new HDD may be a problem. What happens, I think, is that the OS finds redundant hardware and tries to connect to it thus hanging up the system.