Login Failure sql server 2005

  • I have installed the SQL server on a local machine and I used windows auth only. Somehow after installation I am not able to connect the server and it fails with "Login Failure"

    - I am part of administrators group on the machine and by default SQL configures bulitin\adminsitators as sysadmin but I am not sure why it is giving login failure?

    - The strange thing is I can restart sql services on the machine.

    - How can I add bulitin\administrators group to sql from sqlcmd as I cannot get in through GUI?

  • Thanks Steve.

    I have NOT tried using single user mode but I changed UAC setting to minimum level possible and restarted my machine and it worked.

    Is it a bug in win 7 or Is it supposed to be like that?

  • I didn't have that issue on Win 7, but I'm not on a domain. If anything, I would guess it's a firewall or UAC limitation that kicked in, perhaps because of a security patch?

  • its new laptop and version I installed is developer and I have enabled automatic updates on the system but not sure if this caused the issue.

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