Core Update Have to be Installed?

Hi All
Any time a core update is available or about 25 minutes, i have to installed upgrade, because call stop going out and reload the asterisk,is this necessary??

How do I stop this?
Or How to stop goind down every 25 minutes or so.
thanks a lot

I let a softphone open with the phone extention i was dialing in a softphone, I don’t know how to delete this post