when i try to install it, it says that i need to uninstall at&t internet security suite. i've had that uninstalled for months now. it won't continue the installation until it is gone.
If it was AT & T/McAfee then run the MCPR removal tool listed under Useful Links above and reboot then retry.
If it was some other brand of protection then you'll have to check with AT & T as to what it was.