That possibility is going to largely depend on several factors.
1. What version are you running?
2. Does the version you are running require any *.SLF files to activate?
Note: you will see these files located in the directory: C:\Program Files\Common Files\Symantec Shared\Licenses
If the software is the Corporate Edition that does not require any license key file {SLF}, then the answer is "NO".
If the software is the Small Business version that did require a license key file, Can I have you copy the contents of the SLF file, along with your company's name and address information, and I will see what I can find in our Licensing Database.