SQL Server Management Studio error when trying to edit table

Question

I got the following message when I try to edit a table through SQL Server Management Studio.

The machine is my company remote desktop. and everyone in the company tried to do the same failed too. Any ideas? I tried to search around, the people telling me to edit the DbProviderFactory files under C:. but I don't want to.

TITLE: Microsoft SQL Server Management Studio

Exception has been thrown by the target of an invocation. (SQLEditors)

ADDITIONAL INFORMATION:

The 'DbProviderFactories' section can only appear once per config file. (System.Configuration)

Answer 1

Remove empty element DbProviderFactories in machine config files:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\Machine.Config
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\Machine.Config