What to do about felix2.exe?

When NIS 2014 runs a scan on my wife's computer, it finds and marks for submission 'felix2.exe'. Searching on the Web finds that this file has no information in it as to author or company.

So of course I want to get rid of it. But searching the entire hd, both with Power Desk and Windows Explorer, does not find a file with that name, or indeed with any file matching the pattern *fel*. Nor is the file in the Quarantine.

Since the file must be on the hd (or the scan wouldn't find it), and yet hides itself completely from a normal search, it obviously is malware.

So: How do I get rid of it? I haven't yet run PE on the computer (it's late and I'm flagging a bit), so there is still that to try.

But if PE doesn't find it, what are my other options? Is there a program that will find files on the hd that hide themselves from normal searches? I could try another anti-virus program, but don't want to have to completely strip NIS from her computer. Is there another anti-virus program that 'plays nice' with NIS, at least long enough to run a scan?

Also, I've used Insight to check everything that's loaded in memory, and it's not showing there either.

I'll run PE tomorrow. I'll post the results here, either way.