Access Restricted to site

[reddead]

today i got a error when visiting "imgur.com"
is there something i should worry about?? how can a site scan and tell if i have a virus or not??
i am on windows7 with microsoft security essentials only:scared14:

here is the screenshot i got

PS: i remember getting this very long time ago more than once but i did not care at that time...

 

[vivek.krishnan]

Check and post the source code of the page.

 

[reddead]

Strange, i tried a different browser and the same site was accessible....

 

[ivhere]

That is a CloudFlare “Challenge Page”. That is a page that CloudFlare posts to the client browser with a recaptcha challenge to make sure that they are human. You have appeared to CloudFlare as a suspected threat, So they have blocked you to visit the site.

 

[siddjazz]

ivhere is right. Your IP has probably been blocked. If you are using dynamic IP's, try, restarting your modem and then access or use a proxy server.