can't help with MACs or an employer PC but if it's your personal PC you can try this.
Go to the control panel in the start menu and click on it. scroll down to user accounts and click on this. In the new window, you'll see a link to change your account type. click on this. in the next window, change to administrator and then click on the link to change account type. Reboot. The ability to do this may be limited because of other settings on your PC