sharepoint 2010 new web application this control is currently disabled error

Sometimes the new button is in disable state in the central administration while trying to create a web application in SharePoint 2010.

Also you can check my previous posts on:

- New features in SharePoint 2013

- Create content type in SharePoint 2013

- Limitations of Sandboxed Solutions in SharePoint 2010

There are several reasons for that like:

You should be logged in with one Admin account.

Apart from that you can check some solution:

Solution-1:
Try to run Central Administration as administrator like below:

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

Solution-2:
You should try to run IE in Administration mode.

Right click on IE and then click on Run as Administrator.

Solution 3:
- Go to control panel
- Here click on "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.

Solution-4:
Try to login to central administration with a user account which belongs to a administration group.

Now open the browser in "run as administrator" mode.