I'm somebody who'd be amazed if I find a malware on my PC still I followed your instructions and tried creating a new user account but the problem is still the same. They can't be banning MTNL IPs as I seriously doubt their technical know how, something like banning IPs wouldn't be something they know. Other than that, I can access the site easily on XP and Ubuntu, that wouldn't happen if the IP was banned. This is getting crazy now.