How can I reinstall Windows 10 without product key?

Original title: windows problem

I installed windows 10 once by Microsoft account. After some time, my computer got slow & I wanted to uninstall. After my computer stable, I tried to reinstall. But he's asking for product key? I downloaded free Microsoft account. How could I have reinstall the window 10 without product key?

After the upgrade to Windows 10, you cannot use your Windows 7 or Windows 8/8.1 product key.

Click on this Later.

Check if you have installed November update:

How to check if you downloaded or installed the update Windows 10 November

If you do, then all you need to do is change the using your Windows 7 product key or product key 8:

Click Start > settings > Update & security > Activation > change product key and then enter the new product key, and then click Next to activate

If you do not have the November update, download it, and then do an upgrade of the repair:

How to download official Windows 10 ISO files

then

How to: upgrade an of repair using the file ISO for Windows 10

also check

How to install and activate Windows 10 using your Windows 7 or Windows 8 product key

also

How to find your product key after the upgrade to Windows 10

Tags: Windows

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