Windows 2000,XP: C:\Program Files\World of Warcraft\Interface\AddOns Vista: C:\Users\Public\Games\World of Warcraft\Interface\AddOns Make sure its the WoW Addons folder located in one of the following locations: Once you finish downloading them, unzip them to the Addons folder to install them. This process might take a while, but its a lot more reliable to make sure you have everything working. This will help you identify what addons might be causing you to have trouble or making other addons not work. After copying it to the Addons folder, start WoW, log in and make sure it works. I would HIGHLY suggest you do one addon at a time. Lots of addons still have not been updated, if you accidentally install these addons for WoW 3.0 and they dont work with it, you could cause yourself problems. MAKE SURE that they are 3.0 compatible before you download them again. Visit this site or whatever site you normally get your addon updates from and download all the addons you use again. Step 5: Re-download the latest copy of the addons you want to use and install them into the WoW Addons folder. Once you have logged out of WoW again, proceed to the next step. If you want to adjust some of WoW's own settings again, Video, Mouse, etc, feel free. Simply start up WoW, log in to one of your characters and log off.