I personally am a strong advocate of MalwareBytes Antimalware PREMIUM as being a strong defense against most malware attacks.   It should be compatible with just about any anti-virus you're using.

I am also a strong believer in layered protection, combining the best of all protection components, as can be seen from the listing in my signature (below).

(I am not familiar with Sonicwall, and so cannot comment on it.)

I'm not familiar with Sonicwall, but it appears to be for business network protection.

If you are talking about malware protection for a home user laptop, then I don't think you can do better than Malwarebytes Premium (only this paid version provides real-time protection. The free version scans and removes malware only). Highly recommended.

Edit: Oops, ky331 beat me, but I will let this post stand as a confirmation.

Yes, Malwarebytes https://www.malwarebytes.org/ is a good software, you can also try Immunet malware removal - http://www.immunet.com/resources/malware.html