No, this is not a scam.
No, this is not a scam.
It happens when necessary. The reason for securing navigation on their site isn't essential—it's just a precaution.
You just set up BitDefender with this deal, and it mentioned removing any other antivirus programs. I hope that happens—though I think the uninstaller should have taken care of MSE too.
It's unclear why it wasn't removed. I also ran CCleaner, used the uninstaller, but MSE wasn't found.