Where Malwarebytes fits
Use it when assessing suspicious behavior or comparing on-demand scanning with continuous protection.
Check before you choose
Check whether the functions you need require an ongoing paid plan after the initial trial.
Find the right edition
Start with the destination for your device or the publisher's website. Use the current requirements and terms there to confirm the edition you need.
Compare the workflow
Start by checking the protection already running on your device. A permanent security suite, a portable scanner and a browser-cleanup utility are different interventions; installing several at once can complicate diagnosis.