yabba

Ok So I did a scan and 99& of the findings were a harmless program I have. (false positives) There was however one Virus found. I was attempting to add whole list of findings to my ignore list after a scan except for that one. Somehow I mistakenly added the virus with the ok ones. I went into the ignore list with hopes to add it to quarantine but no luck. What do I do now? I assume that now its on the ignore list it can still harm my computer. Any help is much appreciated! Thanks in advance