I had previously had System Cleaner working on my PC. I tried to update this software and received error that could not connect to the server. I removed the software and went to your main site to refresh this product to the most recent version. No matter what I have tired, I cannot download anything from your site that begins with "download.comodo.com/… . I have tried all the free products. I have turned off all my security software, Avira, etc. I am running on a Dell, Windows XP SP3. I cannot even “ping” the site that is provided via the automatic links. I even tried to shorten the link to the first level, and could not connect to anything.