This is best answered by tech support see the link under useful links above.
If they cannot help and I would say they should be able to ask for an escalation acll back to a higher level tech.
Re the account you have a licence for Family protection you cannot remove it from your account only the PC it is on.
To uninstall FP
But that is what you are trying that gives you the issue correct if so call support.
I believe that the user account is an Administrator however you need to type in Administrator credentials of McAfee Family Protection. Try to remember the credentials that you registered as an Admin (MFP) upon Re-install of the application.
Is there any other Windows User Accounts apart from the one that you mentioned above.
@Tony/Peacekeeprt thanks for the advice I have tried chatting with a mcafee agent but unfortunatley the machine breaks down =/ it reboot by itself and having BSOD....
We are now thinking to buy a new machine and try to install the MFP and hopefully everything works.
@Chinthanai Selvan P There are 2 administrator account and 1 limited account on the machine that breaks down
as my post to Tony we might buy a new machine but i'm afraid since the PC1 hostname was registered to the MFPaccount is there a way to delete if from MPH account itself? or it will create more conflict? Thanks