You just have to comply with the license, even if you are only the distributor. Even though copyright isn’t actual theft, there’s an equivalent in this that trafficking in stolen goods is still illegal, even if you’re not the one who stole the items. Distributor beware.
I don’t think Microsoft would just let me go if I were distributing Chinese-made systems with pirated copies of Windows on them.
But,
If you bought dells with windows installed and were reselling them do you think you would end up in court for not having the full microsoft license on your web site?