Can't Download Video Drivers From Dell

After a clean install of Windows 7 i needed to install drivers for my graphics, the CD i got with my laptop won't install the Drivers and when I try and download them from Dell's driver site it will download around 5-10% before it suddenly stops and says its done. I've tried doing this on two other computers I own, in different browsers and they all do the same thing. The download size on the site says 155MB but the file size is only 46MB.