Hi what browsers are you using? i would also suggest 1st updating all of the current add on's you are using. Then if still trouble disable them, and or try to find out which one is causing the problem.
Also try logging in to cnet and there should be a link underneath the green download button, called Direct download. This will not run the cnet installer, and will provide you with the direct download.
If you are using internet explorer go to settings, internet options, advanced and then press reset. Then while in the same place(settings, internet options, advanced), find "disable script debugging(other)" and "disable script debugging (internet explorer)". Even if you do not use internet explorer try the instructions written in red.