Yeah, i'm pretty sure the EU wont approve of locking down PCs that way. I'm also pretty sure that Googles current moves regarding the registration of developers and locking down sideloading will not be seen positively in the current climate, where the EU seeks to become more independent from Silicon Valley. The EU has been adamant in their view that users should not be limited to one market on phones; i believe that trying to lock down PCs would lead to legislation forbidding that.