[qb45]

> There is no need to sign anything, what matters is if the EULA was included in the sale contract (so, the buyer was aware that the willingness of the seller to sell you the product depended on the buyer accepting those additional terms as part of the contract).

Yes, it doesn't have to be literally signed, but it needs to be an agreement made at the time of purchase. If I agree to buy Windows under the condition that I won't use it for the development of nuclear weapons, so be it.

But it's still not clear why I would need Microsoft's license just to use a copy of Windows I have already bought, sometimes even as part of a computer, which is what parent seemed to claim.