My computer's security "wall" does not presently include any app to protect against ransomeware specifically. However, I do image my system drive to a stand-alone hard drive 3-4 times weekly & retain images for several weeks. My image software is on a USB flash drive that loads on its own, independent of Windows. Dumb QUESTION #237-3: Is a clean image a bullet-proof solution to ransomware, even if my computer's boot records are encrypted? Dumb QUESTION #237-4: Is there, as yet, any malware that can screw up my computer's bios?