Thanks guys 
It hasn’t happened again since I signed off AIM. Not sure why as I did not see any ads in the AIM window. I will likely do a complete reload of AIM.
I had already run a check thru all programs opened by registry keys and found nothing untoward.
I also ran a check on new wav files, but noticed nothing recent either.
Thanks for the help and I’ll let you know if it pops up again!