You can not go to the site OpenID, Classmates, websites anti-virus companies, etc. (Sometimes goes down, but offers to send sms to reactivate allegedly because of fault on the site server) What to do? The reason is the malicious program. SMS not sent. It's just a 'divorce' on the money. You go through the 'My Computer' on the disk where the operating system is Windows.
Normally this is drive 'C'. Next to the folder Windows => System32 => drivers => etc (C: WindowsSystem32driversetc) etc in the folder find the hosts file and open it with notepad. We find there the string: # localhost name resolution is handled within DNS itself. # 127.0.0.1 localhost erase all lines that are below these. Reboot your PC or laptop. We try to go to the site you want.
It is also desirable to check the antivirus of your PC. Can you keep on your computer (Establish) a lot of games and / or programs? In general, yes but it is not desirable. Each installed game or program a little less at the speed of your computer and less to its stability and security. (Do not keep 50 games especially if you play from the 50 to 2 or 3. The same applies to software). Obviously should not be deleted (if know exactly what). Computer – this is not a pantry. Trash on the PC should not be (the author – to write this line easily, but get rid of junk on your computer, and in the pantry, it's hard.