There's a couple of suggestions I can give. There are password recovery programs you can use. Here's one as an example. http://windowspasswordsrecovery.com/One other suggestion would be to attempt a restore back to a date before the login started failing. When you boot the computer, hit F8 constantly to get to the option screen. Then select restore from there. Try these and let us know. Happy Shooting!!!!Dave
Have you tried "password" as password, most manufacturer use that as default PW. If that don't work and if it's the BIOS, you can remove the battery and let it drain for 30minutes and it will revert to factory setting or if you can see the reset jumper, just do it from there to clear the BIOS password.
Ask.com gave me this:•Log in to your computer using an account that has administrative privileges. Click the Windows "Start" button and select "Control Panel." Click the link labeled "User Accounts and Family Safety," then click "User Accounts" to view a list of users.•2Click "Manage another account." Click the "Administrator" username to view the main administrator account settings.•3Click "Change password." A text box appears. Type the new password into the "Password" text box. Type it again in the "Verify Password" text box.•4Click "Change Password" to save the new changes. Log out of the computer and log in using the new administrator password.Read more: How to Recover an Administrator Startup Password | eHow.com http://www.ehow.com/how_7490788_recover-administrator-startup-password.html#ixzz16XescJCq
What kind of computer is this? Is it a branded one or home brew? You can try hitting F10 & F12 while booting to get to the Restore option. You aren't restoring data, the screen should actually say restore the computer to a previous date. You shouldn't need a disk for that. And if all else fails, you CAN do a Windows reinstall. It leaves all of the data and programs as is just replaces Windows. But I think the best would be to restore from a previous date.