After restore can no longer login

[Guest]

First let me say I only use this computer to play Lineage 2. I do not surf
the web or recieve email on it. The only changes on this computer are due to
the weekly L2 update.

After a crash of L2, I started getting error messages on restart, and when
starting L2. I decided to restore to a point about 6 weeks ago, which forced
L2 to download several weeks of updates. This did not solve the problem, and
now L2 refused to uninstall. I decided to restore from the beginning of this
January, hopeing that I would then be allowed to uninstall L2.

After the restore, I now get a login prompt, which I have never had in the
3+ years I have had this computer. After I login, it shows that I am loading
my personal settings, then goes back to the login screen. This happens in
normal mode and safe mode.

I only have the one account on this computer How can I get logged in?

 

[Guest]

Update. I now have my computer running under BartPE. In theory I can access
any file or executable, so I should be able to edit user information.
Unfortunately I dont know which files to edit or programs to run.