how do i remove the "activate windows , go to PC setting to activate" hologram from my pc screen .? i was running win 7 prem then installed a new HHD, then upgraded to 8,pro. everything is running ok just have that issue..

You have to activate a fresh installation of Windows, have you done that?
If online activation doesn't work you will have to call the Microsoft Activation Center.
This page provides more information: http://support.microsoft.com/kb/950929
