Malwarebytes Anti-malware Portable _best_

have long seen requests for an official portable version, but developers historically resisted because the software requires low-level system drivers that portable "sandboxes" often can't provide. How to Use Malwarebytes "Portably" Today

For home users: Keep a copy on a USB stick labeled "Emergency Cleaner." When your mother-in-law calls saying "My computer is acting weird," you can drive over, plug in your USB, and run a scan without waiting 20 minutes for a download to finish on her slow, infected internet. Malwarebytes Anti-malware Portable