Here is the format to add an entry to the hosts file on the local pc using the command prompt
echo 18.104.22.168 dropbox.com >> %WINDIR%\System32\Drivers\Etc\Hosts
Where 22.214.171.124 is the IP Address and dropbox.com is the name that resolves to that IP Address
Please note: This is a “QUICK SUPPORT” article. The information contained herein is provided as is. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. More than likely specific steps may be missing and it could very well be assuming you have an advanced understanding on how to complete certain steps.