Don't know any quick solutions in this case!

I have WinXPH and Zone Alarm, and Avast Antivirus, none of these cause any problem with downloading.

Check for spyware using; AddAware, Spybot, etc.
Next scan for virus activity using whatever including what you find online.

Delete Cookies, Clear history and downloaded web cache. Clear SSL State. Look under Internet Options, select settings, then view objects, if you see any damaged objects delete them. (It may also help to delete anything that is only identified with numbers) close all open programs and restart your computer. Then try to download again.

If you are running WinXP and that does not work, you may try using system restore and returning to the last time period where you know the downloading did work.

If you have a CD Burner it would be a good time to backup anything on your computer that you want to keep for a long time and not have to download again.

In my case, I am fearless when it comes to erasing everything on my system and reconfiguring it from scratch if necessary.

I then reinstall and protect as best I can and go from there.
I have on several occasions forgotten to back up some files, or email, or favorites, or pictures, or most anything else you might think of and then been upset when I lost them all during the process of erasing everything on the computer and starting over again.

As a result I now partition my drives and dual boot.
I always have at least 4 partitions;

1 for Win98SE,
1 for WinXP either home or pro version. and
1 for installed programs used by both Operating Systems.
1 for downloaded files, etc.


To make things easier I copy some installation CD's to the 4th partition where downloaded files are saved. Then from Dos or Win98 the installation can be run from the hard drive which is faster than from the CD.

Another advantage to having partitions is having the ability to erase an operating system and reinstall it without loosing stuff on other partitions. The catch to this is you have to know enough about the partitions to make sure install to the correct partition and not over stuff you meant to be saving. . .