Downloadcan,t download any thing

Any error messages ?
The more information you give the better we can help.

Operating system? Web browser? All websites or just a specific one? What kind of download is it? What type of file is it? Are you downloading from a browser or are you trying to download through a program?

Technically by visiting a website you are downloading, so you actually can download something.

As Curlyben mentioned, we need more information.