Unlock uploading file in SharePoint 2010

By default, SharePoint locked the uploading file with some extensions, these extensions may cause the damage your server and user will take advantage of uploading to send a script, virus and even the code executable and control your server from remoting. So, SharePoint has been locked by default to be sure your server to be protected safety.

You will get an error if you try to upload the file with restrictive high level:

However, in some case, you need to unlock to upload the file for internal process, or only in local. It's very simple by remove the extension out the locked list.

Go to Central Administration -> Web Application, on the Ribbon click on Blocked File Types, the remove the extension necessary. This is only effected on each Web Application. To be more safely, put it back the blocked list after finished the uploading, only open if it is really necessary.