What does the error box say? I tried the same link and the download started just fine. Are you using a download manager? Is your connection or firewall blocking FTP transfers? If you have an earlier version of Firefox - You can update automatically by clicking the HELP menu >> About Firefox

what exactly does the error message say?

this is what it said in the error box:

System.CompenentModel.Win32Exeption: The system cannot find the file specified At System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfostartInfo) At System.Diagnostics.Process.Start() At System.Diagnostics.Process.Start(ProcessStartInfo startInfo) At System.Diagnostics.Process.Start(String filename, String arguments) At MyDownloader.IEPlungin.IEMD.DownloadURL(string url)

the string "MyDownloader.IEPlungin.IEMD.DownloadURL" suggests that your pc is infected with a virus/malware - http://home.mcafee.com/virusinfo/virusprofile.aspx?key=1053990#none

you can try one of the tools mentioned in https://support.mozilla.org/en-US/kb/Is%20my%20Firefox%20problem%20a%20re... to scan your system and remove malware (in case you're still able to download anything)

will i be able to remove with my norton software?

i don't know - but update & download the latest ani-virus signatures for the norton software & do a full system scan!

Download and Install MalwareBytes Anti-Malware, run a full Scan. http://www.malwarebytes.org/

Download and Run TDSSKiller http://support.kaspersky.com/faq/?qid=208283363

Download and Install Microsoft Security Essentials http://windows.microsoft.com/en-US/windows/products/security-essentials (not an official endorsement, but I personally recommend MSE as an awesome permanent anti-virus)

Double check for all Windows Updates.

ive done a full system scan with my norton and 10 tracking cookies have been removed. i tried again to download and the same thing happened

you can also check if the download works if you run ie with no addons.

however this would not remove malicious software from your pc - therefore also try to run the security software tyler has recommended (not all at the same time though).

do i have to run each one of them?

do a full scan malwarebytes first and see if it comes up with any results (provided, you can even download it - here again try running ie with no addons).

i tried to download the malwarebytes and had the ie with no addons but still the same error box comes up as usual..

i just put the addons on disable and tried to download the firefox again and it has downloaded! thanks soo much for your help