How to disable automatic updates in CentOS 7?

CentOS Linux release 7.0.1406 (Core) / Linux 3.10.0-123.13.2.el7.x86_64

Last week, I noticed that when I tried to restart, there was an option to Install Updates & Restart. I do not recall manually installing any updates.

Because this computer is for work, I would rather not upgrade software where a previous version is crucial for development... Or somehow make a mistake and take a day to fix it.

PS: If needed, how do I rollback to a point before Update A was installed?