"Downloading" refers to the process of transferring a file from the Internet to your computer. You won't get any error messages during this process.
The files you list are files, not registries. There is only one registry on a computer, and the files it is comprised of are none of the ones listed.
So, let's start from the beginning.
What is the make and model of the printer?
What operating system are you running?
Where are you getting the files to install? CD? Internet? What site?
What exactly are you running or what are the steps you're taking that lead up to the problem?
Are you getting an error message? If so, provide the exact and complete text of the error.