It was only last night that I made sure all of my Windows updates were up to date. I saw no option for this at that time, and I had about 20 updates pop up. The last time I ran them was about a month ago and I never saw it then either. Like USAFRet said, can you take a screen shot? It may/may not be some sort of malware.
If it is, or you are unsure try running malwarebytes to see if it detects anything.
https://www.malwarebytes.org/mwb-download/