IF so, it could be why you're receiving the notification. Removing the update should "get rid of it".
You can read more about it here:
If you have your updates set to install automatically, make sure to read the below in order to prevent it from installing again:
There are 4 other updates tied to Windows 10, but I believe KB3035583 is the update responsible for the notification you're seeing.
Best of luck,
I am running windows 7 and just noticed a icon that just showed up in the taskbar in the bottom left corner of my screen it's to upgrade to windows 10 I'm not sure if it's legit and I Want to get rid of it but can't can you please help? thanks