

It can’t be legitimate because licences for the bundled software cost more than the machines are being sold for. Also, the hardware included isn’t officially Windows 11 compatible, so selling it with Windows 11 installed is misleading the customer into thinking they’re buying something much more recent than they really are. For a decent number of people buying these, they’re likely to own something just as new already, and could get a free upgrade to Windows 11 by doing the same configuration tweaks as the sellers did.
The $5 Windows keys have never been legitimate - either they’re just people selling keys they’ve generated with a keygen or bought with a stolen credit card, or it’s students reselling free keys they’ve got from Dreamspark or a sysadmin selling keys from their employer’s enterprise licence, which, in Microsoft’s eyes, are all piracy. An OEM copy of Windows 11 Pro is about €150 and can’t be transferred to a different motherboard, and a retail copy which can be transferred is about €300. A one-time purchase copy of Office is about €120 (it’s also available as a subscription). These machines either have at least €270 of software on them, or €0 worth of pirated software on them.