Malware on Network Drive

A couple of weeks ago I brought a friend’s computer home and removed the brontok worm from it. Yesterday, I moved some files to a 160 GB WD Netcenter NAS and my anti-virus programs began going nuts. They kept finding the brontok worm on the NAS. No attempts to clean it from my computer worked. I know the device is old and most will recommend to replace it but I would like to clean it up, salvage the data on the device and keep using it. Any advice on how to proceed?

Did you tried booting in safe mode?

The file system in the Netcenter is Linux, very unlikely that it might be affected by a virus.  I recommend you to try to access it from another computer to compare results.