Recently brought an WD TV Live Steamer, username and password?

Recently brought an WD TV Live Steamer, when i try to add an media library manager for network share. It prompts an username and password

I've sent an email to WD about this issue and they replied 

"Dear Alex,

Thank you for contacting Western Digital Customer Service and Support. My name is Ariel P.

I will be more than happy to assist you.

In order to view and play the files they must be shared in the network, so that the device will be able to pick it up.

In this case the username a password is a default setting that Windows 7 enables on the network, in order to protect your LAN. In order to disable this feature you will need to contact Microsoft for steps and instructions.

If you have any further questions, please reply to this email and we will be happy to assist you further.

Sincerely,
Ariel P
Western Digital Service and Support"

May i ask what is this username and password?

Kind Regards,

Alex

Thank you for the quick response!

I followed the guide but no luck where it says 

Ensure that the following options are selected: Turn on network discovery, Turn on file and printer sharing, Media streaming is off, and Allow Windows to manage homegroup connections (recommended).

My media streaming is set on, and cant seem an way to set it to off

Kind Regards,

Alex