All computers have a built-in administrator account, which is not the same administrator account you created during the installation process. It is the default one that is usually targeted by hackers to gain access and control of your computer.
If someone can enable and access this account remotely, they gain complete control of your computer. The interesting thing is that this account is not password-protected, only disabled. Administrator accounts have full privileges that lead to security risks in the event of a breach. Should you choose to enable this account, remember to create a strong but random password to protect it.
The only situation in which this administrator account will come in handy is when your current administrator account crashes, perhaps because you inadvertently delete it or forget your password (very difficult). This is why we recommend that you create two well-protected and disabled administrator accounts and use a guest user account for your regular work. The default or integrated administrator account may pose a security risk, especially if the person has physical access to your computer. Create an additional administrator account with a different password.
Deleting the default administrator account is therefore important for security and creating a new one will give you more control over the account name and password.