Microsoft has just posted excited announcement that Windows 10 is coming in less than 2 months time, 29 July 2015. Earlier Microsoft has announced that Windows 10 will be given for free to upgrade existing Windows 7 and Windows 8.1 machine.
It is simple to reserve a free upgrade copy:
1. If you use existing Windows 7 or Windows 8.1 with latest March update, below Windows icon will appear on system tray.
2. Just click on that icon, enter your email address, and your Windows will be upgraded to latest Windows 10 when it's available at 29 July 2015.
Hopefully, Microsoft will make Windows 10 available for MSDN Subscriber earlier when Windows 10 goes RTM. And, Microsoft, please release Surface 4 PRO and Lumia 940XL at soonest, that will be most exciting..