What, now?

So here's a new problem my computer seems to have developed...

Whenever I download anything, there's a good chance the file is corrupted. Video file, PDF, Install exe, anything! And so I need to check every file immediately and then might have to download it again! That's really slowing me down when I can't trust the download.

Let alone videos don't play properly (flash problem?) and even some images won't load!

And yes, I tried switching things off and on again. It is just my laptop, but I have no idea why. Is it a virus? Did I change some setting? Did some hardware fail? Is it a loose connection in a wire? It could be any of those things... or more!

While I don't want to consider getting a new laptop, that might be the easiest solution if I can't track this problem down, or it doesn't reliably go away. But for now...

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