After uninstalling CA Internet Security Suite completely and cleaning up my computer, I decided to run FS9 to make sure I didn't "clean up" any files from FS9. Worked great and all, but, I looked at the water and thought I could really use some new water textures and reflections. So I go try to download Morewatr from avsim. Just got a Page Could Not Be Displayed error. So I tried a water texture package from simv and got the same page. So, I go and try a different type of file download (firmware for my linksys.) The download/save/cancel popup came up and downloaded fine. It was a .bin file download. Why can't I download compressed files anymore?

I can download off POSKY and other sites but NOT avsim OR simv.

Figuring it out by yourself? 

I had this problem once. I fixed by simply doing my period reformat though, which probably wouldn't help you!