Here’s what I’ve been able to find out:

“Hi Bob, I can’t really say what could be the root cause of this issue without proper log analysis of course.
But off the top of my head, this may happened within our HP OEM deals migration campaing which was triggered couple of weeks ago.
Can you please ask for user’s PC specification if we can confirm this theory?
If the theory is true the SecureLine app on user’s computer was just updated (automatically in the background), not newly installed.
And as the SecureLine app might just be lying there unused for a very long time, it may be surprising for the user indeed.”

If I found out anything else, I’ll post it here. If you get any additional information, please do the same.