Since 2 or 3 days, when I click a download link on the web, the Save As dialog box appears too late. It seems that the computer first downloads the full file to the PC, and only then shows me the Save As dialog box.
Same situation in YouTube, Dailymotion or any other video web site. First, it waits for the full video to be loaded and only then starts to play the video.
The problem occurs with both IE8 and Firefox 3.5.3. I am using Kaspersky Internet Security 9. But it's the same since my OS set-up. I am also using Microsoft Security Essentials.
UPDATE: I uninstalled MS Security Essentials and changed the setting of Windows "Background Intelligence Transfer Service" from "manual" to "automatic". Now everything seems OK. But I am not sure if the problem disappeared because of which change.