Having had a "cyclic redundancy check" error a few times, I bought an ex Dell PC hard drive which shipped with Windows 10 Pro mostly installed. Somehow I managed to sign up to a Microsoft account and ended up with an administrator user account with the my email used as its account name. Worse was that the log in password was set as my email password. I don't want to be messing around with a log in password and the only way I could find to disable this was to cancel the Microsoft account first!!!