The problem causing the WS2016 having a flashing locking is the registry key is the old hdd\ssd drive is still mount as C; after you moved\copied the WS2016 to the new ssd. Then to fixing it, you just have to editing the HKLM\SYSTEM\MountedDevices keys . Swapping the appropriate drive id keys to \dosdevice\C: and problem solved. Google 'Editing the MountedDevices Registry Key' for a detailed guide Probably Win10 flashing screen can also solve by this method.