You can hide the icon by using the 'customize' option.
The Microsoft update responsible for this irritating nag is KB3035583. I deleted it from my Win8.1 device without difficulty, but when I tried to delete it from my Win7SP1 device, it hung up on the 'Preparing to Configure Windows, Please do not turn off your computer' until I lost patience and did a hard shut down and reboot. Not something I would recommend, but I didn't have any real option.
When I finally had my computer back again, it was still there, but hadn't 'installed'. So I'm just keeping it as a 'hidden update' as, having read about Windows 10, I do
not want it as it will remove various Win7 features......
If you keep KB3035583, it will probably give you further nags as 29th July approaches.....
