Possible solutions of your questions

please Do a trace to Your domain: start - run - enter cmd - in the black window enter tracert YOUR DOMAIN - after click to highlight - making enter - skopirovat here in the ticket

If You are experiencing zatrudina, view instructional videos http://ded07.net/helphost/tracert.htm

nadeet on the C drive of Your computer the hosts file and delete from there Your domain name

Your problem is due to incorrectly configured software on your computer. you probably used something like denver and forgot to remove dammen