Installing windows 7

i have been trying to install windows 7 onto my computer. both onto my overall computer i have also partitioned it and tried to install onto a secondary partition.

but when i try to install it it completes copying the files and at around 30-35% expanding my screen glitches. not just freeze. it glitches and i cant read the screen.

when that happens i have to manually turn off my computer and when i start it back up it rolls everything back to my windows xp.

any idea of what my problem is i have tried to search the internet but have not found anything similar to my problem