downloading mods

[Bananadine]

You could try downloading it to another place and then unzipping it (if it's a .zip file) there, to remove any doubt about whether you're replacing a corrupt file or whatever. Then you could move the resulting files to the right place in your mods directory. When you're moving things around using Windows or whatever it's relatively easy to see and be confident about what's going where. It sounds like your problem is happening before that, though, when you're downloading the thing?