I deleted my Wotlk files recently. Today i got it back from the recycle bin but when i try to launch the game i get Error #121. My biggest assumption is that the pack got updated while it was in recycle bin and now it doesnt work. How can i fix this?
Our client requeriments for WOTLK have always been the same, you do need a 3.3.5a patched client.
Not sure what your specific error is, but since it seemed to work in the past with the same computer, I would just simply redownload the client.