Hmm, not the answer you are looking for, 'cos I don't know the solution, but - I have exactly the same thing happen when my Epson R265 is switched on, PC won't fully boot. I switch printer off and PC boots normally. I could not find out why this happens, though I guess a printer driver update might fix it, I just have not bothered.
I have another Epson all-in-one printer which does not affect PC boot-up.
Forewarned is forearmed, I just make sure printer is not switched on when I boot PC.