Unfortunately, you've not given us any information about your computer... Operating system (Vista I'll assume, but which service pack?), make and model, browser type and version your'e using? The more information you give us, the better informed our answer will be. What specifically are you trying to download?

In the meantime, because CNET Downloads are having a number of issues, try using a different browser such as the free Firefox below:

http://www.mozilla.com/en-US/firefox/fx/

If you haven't scanned your computer for malware, which can also cause this issue, please download, install, update, then run a full system scan using the link below:

Malwarebytes Antimalware


Hope this helps and let us know more.

Grif