The dupator Virus is been droppt by a Variant of the Opasoft Worm. Maybe Avast32 contains strill a Dosversion, so maybe Avast is able to clean the Virus under Dos. You do nnot need a Bootdisk, just boot via "F8"
Button into Dosmode and start the Dsversion of Avast. But to consider; recover the files from a clean Backup is always better, than cleaning them.
The Virus seems "only" to replicate and does not modify or delete.
And he should close his Ports 135-139 to avoid getting reinfected by The Opasoft Worm again( if he realy got infected through Virusdropping )
This is only my opinion and remember that i do not work for Avast or an other AV-Firm.