Okay - tried a system restore to about three weeks ago, but nothing doing. Trouble is, I can't pinpoint exactly when the problem started - I don't download mpeg files that often. It's very weird - can download MP3s no problem, and MP4s too. Have searched via google for various combinations "cannot download mpegs", "problems mpeg downloads" and so on, and can't really find anything similar. Apparently McAfee's Safe and Sound can have this effect on IE7, but I've never heard of it, let alone installed it.
Any ideas at all gratefully received!
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