Time to reinstall XP

It's that time again. Every six months or so. This time it's because I'm pretty sure some DVD installed some copy protection malware and it's interfering with a game I just bought. I don't own a TV, I rent and buy movies and TV series seasons and watch them on my computer screen. I'm getting patterns on video that kind of looks like braille and on games it so small it looks like static. I can't find any mention of it on the net so a reinstall is necessary; I'm just draging my feet to do it.