ComputerTime can run in an Administrator Windows account or a Limited (also called Standard) account.
However, it is recommended that a Windows “Limited” account be used for a number of reasons. From improving overall security on your computer, keeping viruses out, and helping ComputerTime to do it’s job better by eliminating the number of things that a kid with Administrator rights can mess with on your computer.
Read more on Microsoft’s site here:
How the right user account can help your computer security