I got this  error while trying to login to HP ProBook laptop. Whenever I put password I got HRESULT error with 0x8007ffff code and on the bottom it just says 'OK' i press it and it goes back to the login screen. First option is to use HP recovery tools and try to use recovery/repair CD Using this option you are in risk to lose your data-Not Good. Other option is try using some other administrative account. I was able to login with local administrative account , also you can use domain Read more

Part 1 Administrative Accounts Administrative accounts include that includes (Domain Admins, Enterprise Admins, and Administrators) Must have recognizable username for auditing purposes. Active Directory build in Administrator account must be renamed and password is known only to company IT director or other executive personal. On annual base Administrative accounts should be reviewed by IT director. Generic Accounts Generic accounts are general user accounts in active directory. And are aplyed Read more