Hidden administrator account in Windows 8.1
My old computer has a hidden Administrator account which can be seen if I boot in Safe Mode. I'm not sure why but it doesn't even have a password, making my computer exposed. I want to know if I can put a Administrator account in Windows 8.1? If so, how can I put or change the password on it? I searched on the Control Panel and then go to Manage User Accounts but I did not see anything from there, just my own user account. Can someone provide a step-by-step instruction on this? Many thanks.