It's not SP1, if it were that'd be a huge bug affecting millions of users.
What you likely have is a damaged userinit string in the registry. You
mentioned non-admin accounts, does this mean you are able to log in with an
admin account? If so, it will make the next steps easier. Otherwise, you'll
need to work from a utility disk like BartPE.
Essentially, what I suspect is this string:
in the userinit string under this key in the registry:
It should end with the comma, but I'll wager it's been appended by something
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help - www.rickrogers.org
My thoughts http://rick-mvp.blogspot.com
"mgeller142" <firstname.lastname@example.org> wrote in message
> Help! I have a number of user accounts in vista that aren't
> administrator accounts, and I can't get into any of them. When I click
> on the icon at the startup screen, it just waits a second, says "logging
> off" and goes back to the startup screen. I tried creating a new one,
> but that also doesn't work - same thing happens. I did try installing a
> trial version of a child timer program for vista, but uninstalled it b/c
> it didn't work, which may be the source of this problem. It also may be
> SP1, which I installed around the same time as well. Help?