Need to change my network login password

[MrSmegzabush]

I have a Desktop PC trying to access my new server. When I first tried to access \\server I entered my info as Guest. I am now unable to Write/Edit on the server shares and I cannot figure out how to get my Desktop (Win7 machine) to access \\server shares as Admin.

 

[marley1]

Under User Accounts, manage credentials or manage network credentials