1. On 
										a machine with network connection, 
										follow Step 1. and 2. and extract the 
										files to C:\VirusScan\NSS and launch 
										NSS.exe. 
										The Virus definitions will download to 
										the local machine here: C:\Program 
										Files\Common Files\Symantec Shared\SymcData\virusdefs-2.5-e\<date.rev>).
										
										2. In the C:\VirusScan\NSS folder, 
										create a folder called “VirusDef” 
										(example C:\VirusScan\NSS\VirusDef) 
										3. Copy all the virus definition folder 
										content from \<date.rev> folder 
										(example:20080725.003) into the VirusDef 
										folder 
										4. Copy the entire VirusScan folder to a 
										thumb drive. 
										5. Now you can start NSS.exe from the 
										thumb drive. It may complain about 
										definition might not be the latest, but 
										you can skip that message. 
Cheers, 
										Thomas
Download the defs then copy to USB drive
1. On a machine with network connection, follow Step 1. and 2. and extract the files to C:\VirusScan\NSS
2. Download the current Rapid Release virus definitions, to C:\ from this location:
http://www.symantec.com/avcenter/rapidrelease.download.html
3. In the C:\VirusScan\NSS folder, create a folder called “VirusDef”
4. Open a command prompt
Start> Run > Type “cmd” and hit Enter.
5. Type the following:
- For the legacy Rapid Release update (symrapidreleasedefsx86.exe)
c:\ <rapidrelease file name> /extract "c:\VirusScan\NSS\VirusDef"
- For the SEP Rapid Release update (symrapidreleasedefsv5i32.exe)
c:\ <rapidrelease file name> /extract VIRSCAN.zip "c:\VirusScan\NSS\VirusDef"
6. Copy the entire VirusScan folder to a thumb drive.
7. Now you can start NSS.exe from the thumb drive. It may complain about definition might not be the latest, but you can skip that message.