SharePoint 2013:the "New Web Application" button is disabled are the central administration

After installing SharePoint foundation2013, directly through the URL to access the central administration, want to enter application management to new, you will find the New button is gray, Even if you're using a system administrator account and you're installing a SharePoint account, it doesn't help.

To solve this problem, just open the Start program, find Sharepint Admin Center Right click Open as Administrator, OK New button is available.

SharePoint 2013:the "New Web Application" button is disabled are the central administration