SharePoint 2010: Create New Web Application Button Disabled

Problem/Issue

You cannot see the "New" icon enabled in the Ribbon menu, when you are trying to create any new web application or service through SharePoint 2010 central administrator.

**Solution 1: **

Start -> All Programs -> Microsoft SharePoint 2010 Products -> right click on SharePoint 2010 Central Administration -> click on Run as administrator

Still the Issue occurs, follow solution 2 ** Solution 2:** Start –> Control Panel –> System and security Now here under Action center click "Change user account control settings". Get the scroll bar to never notify. Click on OK. Restart your system. Now open the browser in "run as administrator" mode. Browse to the create web application page and the button will be enabled.

Solution 3: (use in addition to the above two)

 
Internet Explorer (with Central Admin open) –> Internet Options –> Security tab
Select 'Local intranet' > Sites > Advanced. Add the Central Admin site to the Local intranet zone (it may already be in Trusted Sites, which does not have enough permissions). An alternative is to change to http://localhost:<CA port>/ instead of http://<machine name>:<CA port>/, which should also get the needed permissions.