This should remove the log in password, but it will also remove any "saved" passwords that you may have applied to things like your dial-up internet connection,(if you checked the "Remember this Password" box) so make sure you remember what that is before doing this procedure.
Click on Start-Find/Search-Files or Folders, type "*.pwl" (without the quotes), click "Find Now/Search. When it brings up the various .pwl files, (there may be a couple), RIGHT click on them, choose "Delete". Then restart the computer. After it restarts, you will get a Log-in window again. When that pops up, type in a user name ONLY, DO NOT type in a password. Click Ok, then OK.
Then click on Start-Settings-Control Panel, then double click on the "Network" icon. When it loads, in the Configuration" tab, look at the "Primary Network Logon" area. Use the drop-down arrow menu to select for "Windows Logon" or "Family Logon" whichever one is present. The computer will need to be restarted and should start without a password request.
Hope this helps.