Don't worry, it's not malware, and everyone is seeing it, not just you.
We are experiencing a DDoS attack today. In response, we turned on some additional DDoS protection in an effort to keep the site running stable. You shouldn't see it more than once every 15 minutes, at most.
Sorry for the inconvenience, it should only be temporary!
Edit: As oxide110 pointed out, this is protection managed by CloudFlare - they are a well known service that even Riot makes use of, and the page that says it is checking your browser, is not actually scanning your computer in any way, it has no access to information beyond what your browser normally submits during all requests, to all websites. So it's nothing to worry about, beyond the annoying 5 second delay :)
We are experiencing a DDoS attack today. In response, we turned on some additional DDoS protection in an effort to keep the site running stable. You shouldn't see it more than once every 15 minutes, at most.
Sorry for the inconvenience, it should only be temporary!
Edit: As oxide110 pointed out, this is protection managed by CloudFlare - they are a well known service that even Riot makes use of, and the page that says it is checking your browser, is not actually scanning your computer in any way, it has no access to information beyond what your browser normally submits during all requests, to all websites. So it's nothing to worry about, beyond the annoying 5 second delay :)
The site was down for a long time earlier so I assume it was getting DDoS'd. Kiddies are DDoSing pretty much everything these days, especially if it's League related.
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Is there a reason this was implemented? Or is it malware on my computer?