Date 29th is just hours away, which is the launch date for Windows 10 and upgrade reserved systems getting Windows 10 in bits now. If you’ve reserved your Windows 7 or 8.1 PC for upgrade by clicking on ‘Get Windows 10 App’ icon that was triggered by KB3035583 update, you’ll see $Windows.~BT folder on the OS drive. Right click on that folder and check its size, it gets bigger and increases to file size in GBs.
Microsoft started pushing Windows 10 download to reserved systems
Ensure your internet or network connection is quite good and stable without lags. As Insiders already got Windows 10 RTM, Microsoft started to push Windows 10 to reserved systems a day before. Check yours and let us know.
If you’ve not got the Windows icon by now in the system tray, check the link mentioned above. If nothing worked from that article (may be your system is not Windows 10 compatible), fear not! Microsoft stated they’ll automatically enable the icon for all systems after July 29,2015.