Client problems?

Hey so ever since the update the client just isnt working for me. Ive redownloaded it 3 times and it just keeps saying that I dont have permission to make changes to an archive file. Wtf is that? I love the server I really really do, but if this isnt fixed I'm gonna have to call it quits. Not sure what's been going on lately but I think i can vouch for everyone when I say that the server needs more maintenance. I currently just received my masters degree in information systems, if you guys need help with anything I'm just a pm away! Thanks.

~Miagido

Close your Torrent Client then move your MoP 5.4.8 folder away from your torrent's download destination.
Now right click on MoP folder>Properties> remove "read-only"

It worked, thank you very much!