Windows Vista will bring many changes for the users and in some cases there will be compatibility problems, among others with Active-X. This is a script Microsoft has been using quite a lot with Internet Explorer and Windows XP. Although, Active-X has, more or less, been a constant target for hackers and there is probably no other component that has needed so much fixing. Anyhow, Korean authorities have now ushered its people that some websites they are dependent on (banks and such) may stop working if they upgrade to Vista. They are currently working on updating these sites, but until further notice they are advised to hold the upgrades.