I got problem when downgrading my vista.?

Question

i want to downgrade my windows vista to xp. i got the cd and when i click install windows xp. a message appears and says "This programe is blocked due to compatibility issues", any ideas how to fix this.

thanks

Answer 1

you have to reboot your computer on the e drive

just restart and f8.

Answer 2

you have to get rid of vista first.