Generally, not only by our company, the use of more than one security solution under the same operating system is not recommended because of possible conflict in their main parts.
Usually the resident shield functionality of the products may conflict with each other, resulting in unpredictable behavior in your computer and impairing response to a potential virus threat.
Be sure to uninstall or disable all other antivirus or firewall programs on your computer prior to using a new antivirus/firewall program.