Bought my Flex 4 several months ago and every so often I get a little pop-up at bottom right of screen saying something like "Lenovo Credential Needed." Just what is this and what do I have to do? I don't want to click on it and then find out I did something I should not have done or have signed-up for something I didn't want, etc. What do I have to do the next time I get that "pop-up?" What is it 'asking' for, etc.? Can someone enlighten me?