You Don’t Need a Product Key to Install and Use Windows 10
Microsoft allows anyone to download Windows 10 for free and install it without a product key. It’ll keep working for the foreseeable future, with only a few small cosmetic restrictions. And you can even pay to upgrade to a licensed copy of Windows 10 after you install it.
Whether you want to install Windows 10 in Boot Camp, put it on an old computer that isn’t eligible for a free upgrade, or create one or more virtual machines, you don’t actually need to pay a cent.
Update, 7/18/22: We’ve reviewed this article and confirmed that it still works for the latest version of Windows 10.
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