Why would my WoW be doing this? It tries to put my patches in there as well as my Interface directory among other things. I had this problem previously but ignored it and worked around it; however, having now cleared my computer and reinstalling everything (for other reasons), its doing it again. I install original WoW and update it no problems. When I upgrade to TBC it reinstalls all the patches once again but sticks them in the Users directory and starts messing with my Interface directory. I've now erased everything WoW and am going to attempt to install normal WoW and TBC and then update to see if it makes a differance but any help would greatly be appreciated. Thanks.

Edit: I run on Vista if it matters.