I am cleaning someones laptop up for them (2005 laptop runs about as slow as a computer I had in 1995, it's ridiculous), and I wanted to put a copy of XP OEM on it (it's running Vista 32 bit currently). My question is, is doing this going to complete screw over the laptop? Will the webcam, touchpad, etc. stop functioning? I'm not completely tech-savvy so I wasn't really sure about it. Thanks for any help.