Issues with NSPIRE BLACK EDITION N1562 NNB-A77C

Hi. I own the N1562 NNB-A77C laptop. Recently I installed a new hard drive as old one had failed and on it I installed Windows 10. (It originally came loaded with windows 8). I am having issues with it not booting up the hard drive, unless I do a reset with the CMOS battery and laptop battery disconnected and then holding in the power on button for 30 seconds. If I do this then it will load windows and runs like a dream. Otherwise it just boots into the BIOS screen and it wont go any further. I have tried altering all the settings in the BIOS but it changes nothing. AS I said, the only way it boots is with both batteries removed and a hard reset each time. Do you have any ideas? Maybe I need correct drivers for BIOS or motherboard. This is a brilliant laptop when I can get it going