For some reason (and I don't know why) over the last few weeks my XP Pro has become very very slow so I am thinking about reinstalling XP and applying the tweaks etc. which are documented in another thread on this website. I have 2x 20GB HDD. I have a 5GB Partition which contains XP/Anti Virus/Firewall etc. (What I term as "System" apps) and the other 15GB has games/P2P software etc. on. The other 20GB HDD is used for downloads off the Internet. If I reinstall XP will all my games etc. still work without having to reinstall them? I only ask because of registry entries which will be wiped when I reinstall XP. Any help/advice would be appreciated.