patch error Civ4 complete

Hi everyone,i recently bought civ4 complete (civ4+warlords+beyond the sword). When iam trying to install any patches i receive the message:"the setup has detected that no version of civ 4 is installed."
Operating system:windows vista. Can anyone know why this happens?
Thanks

welcome to cfc
you do not need to patch complete - it is up to date. if a new patch is released it will likely be a custom one for complete.
I would recommend installing Bhruic's unofficial patch for BtS though (in the BtS subforum)...

Nice one. I was on the verge of posting this question.