People misunderstand the Administrators account. They think it should give them absolute control over everything in the computer. This is a popular misconception.
To begin, please don't confuse Administrators (with an 's' at the end) with Administrator (with no 's'.) The former is a user account while the latter is a system account. The system account should never be used for everyday computing.
There is no one account that has complete control over a computer, and that's by design. If such an account existed, and it was hacked, the attacker would have free reign over the computer and be in a position to create havoc.
Instead, all user and system accounts follow an industry best practice that was created long before anyone heard of Microsoft. I am referring to the 'principal of least privilege' (you can google it) which states that each account on a computer should have only the permissions required for its typical role.
Administrators is the user account with the most permissions, but it doesn't have every permission. No account does.
The safe way to do your everyday computing is with a Users account. This was formerly known as a Standard account, then a Limited account, and who knows what Microsoft may decide to call it next week. Regardless, a Users account has far fewer permissions than an Administrators account, and that's good. Fewer permissions = safer. Most people would not want to have the responsibility of caring for the keys that launch a nuclear missile.
So what happens when a User wants to run a program that requires the elevated permissions of an Administrators account? Instead of starting the program as you normally would, right-click on the icon and choose 'Run as Administrator' from the context menu. Enter the password to an Administrators account and off you go.
This is the safest way to run a program that requires elevated permissions, because those permissions are applied only to the program in question and only for so long as it's running.