How can Msn updates get into my linux system

I am sorry if this sounds really weird. But I was temporarly piggy backing of a windows 7 os, network adapter and needed to reboot anyways do to system maintenance.
Suddenly after the sys rebooted, it went from “[email protected]” to "[email protected]"
rather than
[email protected]
then ran init 5 to load destop and stated somthing like
log in
[email protected]–msn.com
hint the msn .com through me off seems this is a linux computer.
whats up with that?

after restart i did not see this anymore

Could it be that the microsoft updates took a partial interest in my internet connection, while updating a networkd PC?
and what are my security threats here?