Um... I issue my profuse apologies.
I was house-sitting last week, and I made a post from their computer - which later turned out to have adware on it.
One of the symptoms appeared on my post (the word 'window' made a link to some advertising), but I got rid of that (after getting rid of the adware on that computer), but apparently only treated the symptom, not the cause.

The timing would be consistent with this problem.

I can't express how sorry I am.

~ Mik
(Posted from home.)