|If it tells you you again do not have permission. try this. Find the command prompt in accessories menu. right click on it and "run as administrator" type:|
net user administrator /active:yes
Now log off the user, you should now see the hidden admin account as well as your user. log into the admin account and turn off the UAC(control panel, under users). It will need to reboot to do that, then you can log back into your usual account. To rehide the admin account type:
net user administrator /active:no
You will be reminded the UAC is turned off
To err is human but to really screw things up, you need a computer!