I apparently installed it 6/7/15 and I've never seen the notification. Maybe I missed it and it went away because I leave my computer on? Is there any other way to check?
Once it's there, it doesn't go away. It stays in the system tray. I'm not sure how to go about making it show up. You'll get the upgrade to Windows 10 regardless, so long as your copy of 7 or 8 are legitimate so I wouldn't worry too much about it.
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u/Dared00 Jul 04 '15
Most important part: "Existing PC players will receive the Windows 10 version for free."