It is possible that your anti-virus software is corrupting the downloaded files or otherwise interfering with downloading files by Firefox.<br /> You can try to disable the real-time (live) scanning of files in your anti-virus software temporarily to see if that makes downloading work. See http://kb.mozillazine.org/Unable_to_save_or_download_files ---- Other things that need attention: Your above posted system details show outdated plugin(s) with known security and stability risks that you should update. *Shockwave Flash 10.0 r2 Update the [[Managing the Flash plugin|Flash]] plugin to the latest version. *http://www.adobe.com/software/flash/about/

I've tried what you suggested, Cor, but nothing has changed. Do you have any other ideas?