I didn't have any problem downloading this file on the 1st. try so the problem has to be on your end. Do you have plenty of free space on your hard drive? If not, that could be the reason why it quits before finishing.
You might want to try using this link if you still cannot download the file from your existing link:
Driver for Assman DASC101A webcam
Download link: (File Size: 78.3 mb.)
Link corrected on April 7. 2013