I've had to update my wordpress sites continually. Not sure how or if, but it seems that there has been an unusual amount of problems since Netfirms sold itself to another hosting company. And not too long afterwards there were "offers" for security "protection" to keep the websites on ones account secure, for a fee of course.The new company is Endurance International Group.
That just seemed a little suspicious to me.
They also have had a number of downs times for my site, which after I ask for support are fixed. Not sure what that is about. Maybe the new normal.
I hope these are just hiccups for the changeover of ownership. Fingers crossed.
Norton caught a couple files when I tried to create a backup of my site. That is what first made me wonder if there was backdoor activity. Google adsense always fluctuates for me, but it had had dropped to unusually low levels, and other such things that made me go "Hmmm".
Then I had a fatal error today in the admin part of one of my sites. The index.php was taking too much memory to load. What? So I downloaded fresh copy of wp and uploaded it. Now everything is working again.