Hi vishwanath99,
Please follow this instructions for Symantec AntiVirus Corporate Edition 10.x:
You can
update any Symantec AntiVirus server or client by downloading the .xdb file from Symantec. You can also copy an .xdb file from the VPHOME share on any Symantec AntiVirus server. The modified date of the .xdb file matches the date of the virus definitions. When using this method, RTVSCAN.EXE checks for new .xdb files, and then initiates the update process. RTVSCAN.EXE checks for new .xdb files about every 10 minutes by default. Restarting (stopping and then starting) the Symantec AntiVirus Server process can be used to manually initiate the update process if you do not want to wait.
To download an .xdb file from Symantec:1. Go to the "xdb folder" at the following Symantec FTP site:
ftp://ftp.symantec.com/AVDEFS/norton_antivirus/xdb/2. Click the
.xdb file with the latest date, and select
Save to disk from the dialog box.
3. If the .xdb file downloads with a .zip extension, remove the .zip extension by renaming the file. The file name should be similar to the following:
vd12bc02.xdb 4. Copy the ".xdb" file to the correct location, depending on the type of installation:
- For NetWare servers, the default location is
SYS:SAV.- For Windows computers, the default location is
C:\Program Files\SAV or C:\Program Files\SAV\Symantec AntiVirus.
Note: This method does not apply for 64-bit versions of the client. Hope this will help you??
If not please post reply with more information about your version, problem that occur etc. after that We'll try another solution with Intelligent Updater. 
Regards,
S.