You can edit the Registry to get rid of it, if you feel confident enough.
It disables the UAC, (User Account Control), by setting the DWORD value to 0 (zero)
Type REGEDIT in the search box.
RIGHT click on Registry Editor and run as Administrator.
Now the registry is open.
In the LEFT pane, select HKEY_LOCAL_MACHINE (click the > to expand the list in the left pane)
Click the > of SOFTWARE
Click the > of MICROSOFT
Click the > of Windows
Click the > of CurrentVersion
Click the > of Policies
Click the word System
In the RIGHT pane of System, double click on EnableLUA
This will open the DWORD edit panel where you change the "Value Data" from 1 to 0
This will than ask/force you to reboot the system
Before you do it, read this:
how-user-account-control-works and make sure you are happy with it, especially the bit:
Never notify (Disable UAC prompts) will:
Not notify you when programs try to install software or make changes to your computer.
Not notify you when you make changes to Windows settings.
Not freeze other tasks until you respond.
Not recommended due to security concerns.
OR, you can simply open UAC from the search box and select the security level you want from there. Its a smaller hammer to use