32 or 64 bit computer?

I am not exactly computer literate, I have a Lenovo E540 running Windows 7 Professional and I have F-Secure. I want the added protection HitMan provides, just need to install the proper software.
Thanks.
 
I may not have Windows at home, but I have to agree with my 3 colleagues here, aviationgypsy.

32 bit systems are completely losing support. I have software at work that is 64 bit compatible only.
Now regarding the antiviruses. In simple terminology, 2 or more antiviruses create congestion in a computer. Your computer will slow down, whether you like it or not. Not to mention that they will bother each other.

By the way, I've seen how 1 antivirus thinks that the other is a virus, and vice versa. (It ain't pretty)
 
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