I often see in this forum whenever someone has a problem with their XP Pro either registry or etc..there would always be a recommendations to re format and fresh install XP.You see., upon inserting the XP CD (if you've already XP Pro installed) there is a dialogue box which says 'Upgrade' or 'New'.In my case, after installing and uninstalling a lot of programs and softwares., which do you all recommend., an upgrade or a fresh install ? What is the difference between these two ?