Did you double check the MD5 of the files with the MD5 file that was provided with the download to verify that they aren’t corrupt? If they verify it might be something else that’s wrong. Lack of disk space maybe? If you’re using 7zip to extract make sure you click the Extract button and not just drag the files onto an Explorer Window. If you don’t have enough free space on Drive C (regardless of whether that’s where you’re extracting it to or not) it will fail because the drag and drop method uses a temporary folder to write to on Drive C before copying it over.

Otherwise, I have no idea.