Even with an SP4 ISO, you will have roughly seven years of additional security patches (2003–2010) to install. Spiceworks Community Windows 2000 Server ISO Download? - Spiceworks Community

: While SP4 is the final official service pack, there are roughly seven years of additional security patches (June 2003 – July 2010) that are rarely integrated into standard ISOs.

Even with an SP4 ISO, the system will not be fully secure against modern threats. After installation, you can apply additional updates: Update Rollup 1 for SP4

. There is no authoritative way to verify that a custom "patched" ISO has not been injected with malware, rootkits, or remote access trojans (RATs) by an anonymous uploader. The Vulnerability Factor:

with over 300 updates up to 2010, plus updates extending to 2016 for some components [6]. Windows 2000 SP4 AIO (5-in-1)