How to upgrade Windows 7 (8.1) to Windows 10

It is not necessary to wait for update to download. You can upgrade to Windows 10 with a help of Microsoft Wizard. 

Download the update wizard from Microsoft website:

https://www.microsoft.com/en-us/software-download/windows10

Choose 32 or 64 bit version depending on what kind of OS you are currently using:

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Choose Upgrade this PC now:

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Wait until update is downloaded:

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Press Accept and then Install:

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In such a way you can force the update to Windows 10 even if you do not have the icon in the taskbar. Good luck!