If you are looking for an "updated" way to play specifically for multiplayer and security, the community-driven Plutonium Project is the modern choice. It provides its own launcher and dedicated servers that are actively moderated.
Call of Duty: Black Ops 7 Installation and Setup - Activision Support call of duty black ops 1 setupexe file download updated
Note: This is for archival/personal use only. Distributing this violates copyright. If you are looking for an "updated" way
Users often search for "updated" exe files because of a common bug where the game gets stuck on an "Updating executable" loop during launch on Steam. Verified solutions include: Simultaneous Launch Distributing this violates copyright
You don't download a single setup.exe . You download the Steam client, which then downloads and installs the game files. However, you can create a backup of the game files which includes a functional .exe .