Not sure yet if it will prevent the popup for the system OTA update.
I won't lose root access by applying the update?
You probably need root to disable it...are you rooted?
3 easy steps
1. Install free System Tuner
2.Go to Startups
3.Select Google Services Framework
4. Uncheck SystemUpdateInstallDialog and SystemUpdateInstallDownloadDialog - picture indicate 3 unchecked - use the only 2 I mentioned in the instruction.
Simple and easy way to stop the system update notification