Microsoft going to release windows 10 of 29th July . And you can upgrade your computer to Windows 10 free only if you have already running a genuine copy of windows 7 or Windows 8.1.
But if you dont have genuine copy of windows 7 or windows 8.1 then you will have to buy windows 10 genuine license to perform clean install.
Windows 10 home version license cost is $ 119.99 and Pro version cost is $199.99
If you want to try windows 10 then follow the link to join the windows 10 inside programme.
For more information visti the blog.
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