ok i'm not a very good computer user neither writer , so i'm gonna do this in point-style story:

1. I am planning to play EU server , so i decided to install trial account (EU) using my current account here .
2. Installed the WoW-installer , and i thought should be installing every version (vanilla > BC > LK) ,
3. After the BurningCrusades' download, they patch up to 3.35 (latest one) , and i am able to play ( trial EU version).
3. I found out i made a royally dumb-mistake , coz i noticed i have two unneeded WOW-EU folders ( from wow vanilla and BC) , so i and deleted the folder directly.
4. a friend came over my house and recommend me the EU server . when he is about to show his EU acccount on my compt , he can't logged in my WoW-Eu trial wow. ït said smth about needing to install WOW WOTLK
5. so i donwload WOW-installer and it popped an error

"failed to create files for World of warcraft Installer. Pleasec close applicant and try again later"

6. and here's wat's written in the notepad
CreateDirectory failed. - C:\Users\Public\Documents\Blizzard EntertainmenttOwh占u､・ｰ・\World of Warcraft Installer
CreateWoWPaths failed

pls help =(

Notagirlz,

Is your friend's account a full version or is it also a trial?