network wizard won't start

Hi,

I have recently cleared a virus on a XP machine in the
office, and removed some of the registry using regedit.
After that, the network connection died (no lan
connection is possible). As I try to setup the connection
again, the "Network Setup Wizard" will not start after I
close the "new connection wizard". I cannot find the
recovery disk for XP. Is there anyway to recover that
wizard without installation disks etc? Please kindly let
me know. Thanks in advance

C Chu