About a week ago, while in Mexico, this appeared on my screen. I am very reluctant to click on unfamiliar pop-ups, so I took a screenshot, logged on to avast.com to update the database, was informed that the VPS was already updated. The pop-up appeared two or three additional times, then did not re-appear after I returned home (U.S.) from Mexico.
Today a similar pop-up appeared saying, "An error has occurred while trying to update the VPS, please click here to try again," or words to that effect. Are these valid AVAST notifications? If so, what may be causing them?