Hello all, I too was having this same issue. I am running Windows 8 Pro(X64) and am perfectly fine with it. Like the user before me who posted the same, I have NO intentions of upgrading to 8.1 and this notification was getting annoying. As Rajesh had suggested, I searched installed updates and I did locate KB2871389. I have uninstalled and hid this update from the windows updater. I have noticed that the first thing I still see when entering the windows store is the 'upgrade to windows 8.1' advertisement. I suspected that was unlikely to change. Anyhow, it will take some time to see if this fix will actually work as the notice to upgrade seemed to pop up randomly without any sort of regularity. I use my computer daily and after a period of time, maybe a month or so, I will post back and let everyone know if this fix actually worked. If the notification appears before then, I will report back immediately to let you all know that the fix did not work. This is one of those fixes that are going to require some patience due to the random nature of the notification. Until then, CHEERS!
UPDATE!!!! KB2871389 is NOT the correct update to uninstall. The CORRECT update to uninstall IS KB2885699. You can verify that by checking this link. http://support.microsoft.com/kb/2885699/en-us Another simple fix is this; Run regedit, then navigate to: HKEY_LOCAL_MACHINE\SYSTEM\Setup\UpgradeNotification. Change the value of UpgradeAvailable from 1 to 0 Reboot And have a nice day! :)