would anybody know the answer to this, please...

I've run our AV (Bullguard) on my BF's pc, it picks up the two infected files,
so i wrote down the file path names and checked them on my laptop, I ran an complet AV scan on my laptop which did not find the infection. I scaned the files individualy and they came up as Trojans!
I've removed the two files from my BF's pc via the AV, then ran the AV in safe mode to make sure the infection has gone, all clean!

Is there anything else I can do?

Thanks
Emby