I was guaranteed updates at least 3 years on the current version 7.
Version 4 lasted way over 10 years (It was version 4.3 in February 2003) and was only 1 of 2 anti-virus products that had real "rootkit technology" Symantec was caught with thier pants down, as we most A/V vendors. OK, Panda was the other guy, besides avast!, with that rootkit recovery. avast!'s was VRDB, and Panda had something similar in their Enterprise version, but was OFF by default. J.R.