While i don't have an X1 yet
I did see this on a guys X1 the other night. He has firmware 3.8, which he orignaly upgraded from 3.6. He did this originally with XP and no problems. We tried 2 XP machines trying to get 4.1 on with NO luck (same problem as you) which maybe means that 3.8 has stuffed something up in the projector?
I'd try a 98 PC or something if you go one to eliminate XP
I'd try a 98 PC or something if you go one to eliminate XP