After changing the locale (Control Panel / Regional Options or Control Panel / Keyboard) and restarting your computer, you may experience:
An access violation error message. The Remote Procedure Call (RPC) service becoming disabled. The inability to connect to network resources.When you right-click My Computer and press Properties, the Full computer name on the Network Identification tab is correct, but if you press Properties on that tab, the NetBIOS name is displayed as underscore characters.
The problem occurs when the computer name uses a different language than the current locale.
Either re-enter the computer name using the current locale or change the locale.