Sep services stops automatically

Hi,
It's a customer environment.

I have two sep clients installed on server 2008 r2 standard edition.
I observed that the client service stops automatically and randomly (no time frame)

Sep 14 mp1 is installed on all server 2008 std editions but these two systems getting affected like this.

I have aksed them to enable tamper protection. But what could be the reason for this behavior?