Thank you guys. Renaming that file at first did not work but after while those annoying updates have stopped so i think it's working.
What's weird is that even after reboot they still were popping up but only after some time they stopped. Odd. Thank you guys.
Hmm, I've experienced this on Stock 2.3.6 ROM, the download still showing but stopped, It's annoying but, I'd try factory reset & after it completed I'm turning on the phone without sim card (to ensure there is no internet connection) & renaming the "otacerts" file. So download will not be showing & not started