Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Can't login after changing from domain to workgroup

Posted on 2008-10-28
8
853 Views
Last Modified: 2012-06-27
Windos XP Pro notebook that was previously on a domain.  I changed to a workgroup and after rebooting, can not login.  Gets to the "Press CTL-ALT-DEL to begin" and then get User name and Password prompt.  When I fill in name and password, get "LOGON MESSAGE:  The system could not log you on.  Make sure your User name and domain are correct".  No third box below with any domain selection.  Even if I select OPTIONS nothing appears.  I think it is confused thinking I am still on the old company domain.

Is there a back door where I can login.  I don;t know the administrator password either.
0
Comment
Question by:dettore
8 Comments
 
LVL 39

Accepted Solution

by:
BrandonGalderisi earned 250 total points
ID: 22826093
You won't be able to use the name that you previously used to log in to the domain unless you created the SAME login account on the local machine.  Perhaps you should attempt to login as administrator.
0
 
LVL 14

Assisted Solution

by:dfxdeimos
dfxdeimos earned 250 total points
ID: 22826123
If you do not know the LOCAL Administrator password then you are going to have to either find it or recover it by breaking into the SAM with a boot disk.

You can find more information about password recovery here:

http://www.petri.co.il/forgot_administrator_password.htm

You do not see a domain selection box because it is no longer a member of a domain so it only has its own security context.
0
 
LVL 18

Expert Comment

by:flyingsky
ID: 22826122
you will probably have to reset the local admin password if you don't know
http://www.petri.co.il/forgot_administrator_password.htm
0
Connect further...control easier

With the ATEN CE624, you can now enjoy a high-quality visual experience powered by HDBaseT technology and the convenience of a single Cat6 cable to transmit uncompressed video with zero latency and multi-streaming for dual-view applications where remote access is required.

 
LVL 35

Expert Comment

by:Joseph Daly
ID: 22826139
Yea when you disjoined it from the domain you essentially removed all user accounts that were not local from accessing the machine. Now you have to log in with a local administrator account on the physical machine in order to make any changes.

If you dont remember the password I would reccomend using one of the tool below to reset the password.
NT Offline password - This lets you reset local admin password
0PHcrack live cd - This will attempt to crack the passwords using rainbow tables.
UBCD4win or BartPE - These have unlock applications built in which will let you reset the password.
0
 
LVL 35

Expert Comment

by:Joseph Daly
ID: 22826161
My personal favorite tool for password recovery. It is abootable live CD that will break most windows passwords pretty quickly.
http://ophcrack.sourceforge.net/
0
 
LVL 2

Expert Comment

by:neod
ID: 22826228
This happens if you do not have a local machine account.  you will need to locate an active local machine account or use a tool to hack the SAM and create a password.  Also, your Administrator may be disabled.  I have seen admins do this when joining an domain..
0

Featured Post

Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
Possible fixes for Windows 7 and Windows Server 2008 updating problem. Solutions mentioned are from Microsoft themselves. I started a case with them from our Microsoft Silver Partner option to open a case and get direct support from Microsoft. If s…
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question