Reset DNS

Clearing the DNS cache forces DNS to query a DNS server rather than using information stored in the cache. You might want to clear the DNS cache when making changes to websites that you manage, or if you're receiving repeated errors when you know that a web address you're typing is correct.
Note
You must open a command prompt with elevated privileges to complete the following steps. For more information, see Command Prompt: frequently asked questions
Click the Start button .
In the search box, type command prompt.
In the list of results, right-click Command Prompt, and then click Run as administrator.  If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
At the command prompt, type ipconfig /flushdns.