That top link seems to work for me.
Because of restrictions in these forums the two links you provided above do not include the full URL or web address. You will see that the links are each divided into two parts, blue (clickable), and black.
What is strange is that, for the top link at least, if I click the clickable part, I still get to a CNET Download.com page which, when I click the "Download Now" option, offers me the download. I didn't complete the download because I am not sure where I am. It looks like a Download.com page, but I am not sure.
I found the Avast Free Antivirus 5.0.545 here;
Click that, then click the "Download Now" option. The page will change to;
and then a popup should appear offering the download.
Those two pages are the genuine CNET Download.com pages and should work.
I will report what you have found to the Download.com team for them to investigate, and see if there is some error, or something more sinister.
Many thanks for reporting this, and I hope my links work for you.
we have some problems with downloading avast! Free Antivirus 5 from cnet.
Clicking on the link at the bottom for the free version, I was taken to:
Clicking on the "download now" which had the link of:
I was taken to another page for a moment and then got the error message:
404 Not Found (in title)
The requested URL /downloadcom/s/software/11/38/05/67/setup_av_free.exe was not found on this server.
Thank you for resolving this issue.