   Any Microsoft SQL Server 2000 experts? I need URGENT help.
  HiMy business depends on sql server running, I have enterprise managment software running across my network, and it depends on the sql server running on the server.when i set it up I basically jumped through all the installation screens, and for the login page, I did the administrator username and password on windows authentication.A friend came over to my house, and was helping me to install software on some machines, and I was in the toilet, he shouted whats admin password, so I thought no harm, he is my friend, so I told him. (i have told people my passwords before, i just change them after!)anyway after this, I changed the administrator password, and then I needed to restart the server, and now the sql server isnt starting up. I am guessing if I put the password back it will work again, but I do not want to change the domain security policy (no same passwords in 48 hours) I will if i have to though.If anyone can tell me how to make it log in please say.also at the time I left the sa password blank, I was wondering if i set one now would it mess anything up? and what does the sa account actually do! I am not a expert at sql server, I simply installed it because this software needed it.ThanksWilhil 
  with help of someone on microsoft board, I changed the service login from administrator to local service.but I was wodnering if someone could tell me what does the sa account actually do?Thanks ;[edited by - michalson on February 19, 2004 9:12:00 PM];  the sa account can be used to access the server when you do not have a logon for the computer itself.  So if I had your sa password (which btw you would be smart to change because anyone can get admin by typing sa for a username and leaving the password blank) I could loginto the sql server without being a user on the domain.  Also it is used by some admin applications. 