When you want a computer to stay on 24/7 no matter who’s using it, take away the ability for other users to shut down the computer. This is an easy task. But before doing that, you must have administrative access.

Go to Start -> Control Panel -> Administrative Tools -> Local Security Settings and in the right hand window expand the Local Policies branch then click on the User Rights Assignment tab. On the right hand window now find the "Shut down the system policy" and double click on it that will open up a new window. Now simply add or remove the user groups that you want to have shut down power and you’re set!