I just had this happen to me when I bought a parcel and immediately started moving things in. So I really didn't know when the problem started since there doesn't seem to be a consistency on when the message keeps popping up.
Thanks to this thread I started looking at what I had out or over my land line and especially looking at things that have scripts. I had started just taking some nonessential items back and clicked on the message. Note: This hadn't done anything before. But this time it told me what the object was right after I had turned it off.
The culprit was falling petals from a tree. I turned the petals off and so far have not had any problems. HTH