Show username instead of "System Account" in SharePoint 2010

Problems:

When I load my local SharePoint site, the account always show as "System Account". If that, all the operations and loading files will related and shown as "System Account" but not my name.

 

Solution:

1. Open SharePoint Centeral Administration.

2. Select my local SharePoint -> double click "User Policy".

3. Open "Policy for Web Applicatioin".

4. Choose my name -> Edit Permission of Selected Users.

5. Make sure "Account operates as system" checkbox unchecked. -> OK

Here is the reference: http://www.dhirendrayadav.com/2010/07/show-username-instead-of-system-account.html (Tried and it works.)