A flash drive my university gave me had conficker on it. My anti-virus programs caught it but it sure scared the hell out of me!
Most major anti-virus programs today will detect it, I'm pretty sure; I had the best luck with Avira AntiVir. If they have a problem on multiple computers or aren't sure which are and aren't infected,
this site will allow you to see which computers are infected faster than scanning all of them.
Of course, tell him to consider any removable media unsafe until he can securely test it.
All that said, conficker is fought like most viruses are; basic virus-fighting techniques work just fine against it in my experience. Good luck!