diskutil wants to make changes

After having created a standard user account, a message appears stating,

"diskutil wants to make changes. Type in an administrator's username and password."

I entered in the administrator's username and password and clicked "OK", which made the window close, but this message/request appears every time I log in to my standard user account.

I have tried repairing permissions in Disk Utility, but the same problem still persists. Any advice and/or suggestions in resolving this matter would be greatly appreciated - thank you.