Not any of the patches will install. Why?

[sayyadina]

I have all the EP´s and the stuffpacks, and I tried to reinstall the game and also install the patches one after another. Only one patch installed, all the others get errormessages, and the installation is broken. I tried this with a clean game and almost nothing running in the background. Now I just cant figure out why this is? Any ideas? (the game of course worked without them, but its weird anyway) I think I needed the "pets"-patch the most.
Thanks in advance.

[Canoodle]

Delete the ones you downloaded and download them again. They probably got corrupted somehow.