w32.opaserv.worm

Opaserv can travel over network shares, so your client could just be getting infected again over the Internet.
I would either a)disable NetBIOS over TCP/IP or b)install a software firewall on the client's system.
Personally, I use ZoneAlarm on mylaptop, and I only connect to the Internet on it with a dial-up connection. YOu would be surprised at how many inbound connection attempts it blocks. For example, I was online Saturday afternoon, and ZA blocked 34 different connection attempts!

hope this helps

Please go to the following site....http://tinyurl.com/1pwu
and read it carefully. You must disable ALL shares, this includes your hidden shares...ie...C$,D$ etc...
The link above is the norton site for this worm.
Good luck!

Mike

Use the following link & follow ALL instructions contained there. You will not have the problem again.

http://securityresponse.symantec.com/avcenter/venc/data/w32.opaserv.worm.removal.tool.html

Onece you follow the instructions contained in the link, you will not be infected again.

As mentioned get the removal tool from Symantec and make sure to follow the instructions. Also if ME or XP make sure to read section on the restore folder. Also the tool can be ran from a floppy disk. Make sure to write protect the disk.

If you're being reinfected it's probably coming over the network. Also there may be a file that's seeking out the virus everytime the internet is connected. Get adaware.
Disconnect each computer from the network, and then scan with NAV using the latest virus definitions.
Run the removal tool on each computer to correct all of the changes made by the worm.
Do another complete scan on each system before reconnecting the network.