Is this a FULLY updated Windows 7 SP1 machine?
Is it 32 or 64-bit?
Did you completely uninstall any previous A/V software, using their clean-up tool if necessary?
If this is a reinstallation of McAfee then go to Control Panel > Programs and Features and uninstall all McAfee products.
Run the MCPR Clean-up Tool and reboot.
Go to your online account and download/install from there.
thank you sir for the quick reply...
and I already done all those utility cleaning program but problem still presist....
it always stop at 80% when Livesafe installing
ok thanks again...