I am wondering whether there are any AV products that you can run to scan your harddrive without having them installed, sort of like 'portable' software programs that people carry around on USB drives and run on whatever computer they happen to be using?? I know you can't have 2 installed AV programs becuase they will interfere with one another. I have an AV program installed already. So I am wondering whether any AV company makes a self-contained program that you can extract to a folder, open and update, and then run manually as needed (like Malwarebytes, for example) to supplement your installed AV program? And before anyone replies 'use an on-line scan,' that is not what I am asking about. I don't want to use an online scan - I want something on my harddrive that I could update and then run after disconnecting from the internet. I'm not looking for something that will be active - I already have that in my installed AV. I'm just looking for maybe another AV scanner that I could run manually without being on-line, something that might catch things my regular AV missed. I have asked this in another thread, but the replies were always 'why don't you want to run an on-line scan?' Thanks in advance for those thoughts, but what I am really asking about is whether there are any programs I can download and run myself that would do the same thing. Thanks!