Yes it is possible to do so; however, as stated above, it may result in conflicts. This should be tested in a lab environment before implementing it in production. Some A/V software vendors offer a choice of different scanning engines or layered engines for a quadi-defense in depth approach. It should be noted, however, that using more than one scanning engine bi-directionally in real-time may result in sluggish performance as a result of inspecting each file upon access by each A/V program.