When you first installed, did you have the option to
select, "This Computer belongs to a Domain" You might
want to select no if that is the case. Is your computer
hooked up to a network? The internet? If so try
disconnecting, unplug the cable(s) The problem I see,
unless someone else can help, is that you may have to
start over if you can't gain access to the "Admin...."
account to change passwords\domain status etc. Safemode
is not an option for you if there is a password and you
don't know it. Did the install ask for you to make a
password recovery disk? you might consider that next
time. It sounds like you would be better off to do a
clean install as the intial install apppears corrupt. If
you Partyion Magic or the likes and have created recue
disk or you know someone that has, boot with the disk and
create a partion to your liking\size and copy all your
important stuff to it. just access a command prompt and
copy to the partion drive letter. If you like you can
then boot with the disks again and hide the partion until
the new install is complete. I recomend this as on
occaision XP has corrupted drives in the past before and
data has been lost. It take guess work out of data loss
if it is hidden.