In computer contexts, is a very common word that means "to delete" something from a disk, a cell, a text box, etc. So should mean deleting the malware or the infected file forever.
is less common, and I think it's closer to "to get rid of" here. A common reaction to the detected malware is to move it to another special directory, so it probably refers to this. This action is often referred to as () ("to quarantine") in Japanese. Or may refer to removing the virus from the infected file thus making the file uninfected again (although I doubt this is possible).
Anyway I agree these are confusing, and even a native speaker may feel like consulting the official documentation.