Answers:
check your payment even from tools, later internet option, your height may be to giant to access any sites
?
Are you sure that the site address is correct? The site might certainly be down.
e.g. Demonoid have be down since Sunday, no-one can access it.
Can it plain any site? Is it a protected site? Try www.MSN.com or www.Microsoft.com to see if it's working at adjectives.