This product is available only as part of Symantec AntiVirus Corporate Edition, It is currently the only 64-bit virus protection solution offered by Symantec.
Browsing the list of Symantec products you do not find software designed for 64-bit systems.
Setting out from another direction, there is a 64-bit product support part in the list of virus updates. After some searching, it turns out that there is a Symantec’s 64-bit virus protection solution under the name AntiVirus for 64-Bit Windows Clients and it is part of the AntiVirus Corporate Edition 10 program suite.
This virus protection is not a full native 64-bit solution, it is mainly comprised of 32-bit code, and only the parts at system depth are written in 64-bit code.
The former, number 9 AntiVirus Corporate Edition also contains a 64-bit client, but this can be installed only in AMD processor environments. The current program does not show up among the setup options automatically started from the CD; the setup can be found in the SAVWin64 directory.