HOW TO INSTALL ADDONS

How do i remove addons?

I need 2 get group calendar add on i cant download it keeps telling me unable to download because of previous instance (00000000)

I have exactly this problem.

Have had to switch to my sons pc as my laptop died, and he had no Interface or AddOns folder.

Am not a noob and have used add ons successfully for last two years.

I have created these manually, tried to install downloads both via Zip and manually, the directory reads great, all in the right place, right level of folders etc, but when I log in to WoW, there is no AddOns button showing on the start screen and no add ons in the game?

I have tried the Blizzard repair tool and it can find nothing wrong with my install (even though it is obviously missing the Blizzard add ons - go figure) so don't have a clue.

Am finding it really hard to raid without add ons and could really do with some help.

ooops
This was in reply to Vamare who had no Add On button on the WoW log in screen

Walcote, iv the same problem.. wheres my addons folder =[

ive tried and wat 1 do i press open or save or autonatic or manual wen i press automatic it comes up with error

i dne all u sed even uncompressed it put the folder in interfaces n addons n it still isnt coming up on screen its been like 2 hours i double checked everything its allright wat do i do