My PC, which was off line for about a month (problem with video feed, now fixed) now reports that my windows 7 is not authentic. A pop up appeared when I booted saying that there is an issue with my windows. (I ignored because many scammers send fake messages to philsh one. Also, tiny text message in lower right corner of screen saying windows installed in not authentic. This is bogus. Windows installed on PC is same one that been on all along - installed on machine when PC assembled. Only thing I can think of is I had to reinstall it a while back. However, I alos reinstalled a year ago - a no message came up. How do I determine if its all bogus messages? If it is actually from the real MS, how fix it? Just nervous about how unforgiving errors can be ... appreciate any useful appropriate advice you can give.