Hi Luke,
Your issue with localhost\admin loginis one example of the topics that are normally answered on TechNet.
This forum caters to IT Professionals who are responsible for supporting multiple computers in a professional capacity. Topics on this forum include those questions and discussions which typically take place in businesses and on networks. Such as deploying Windows to multiple computers using images, hardware and software compatibility, client security issues (including those related to domains and Active Directory).
Click this link to post your concern on this thread which has a similar issue.
If you have other concerns, don't hesitate to get back to us.