我忘記Vista密碼呀！！點算呀！２０點呀！！

One of the famous password resetter is Offline NT Password & Registry Editor by Petter Nordahl-Hagen. You can download it from http://home.eunet.no/~pnordahl/ntpasswd/. Available as bootdisk or bootable CD, Offline NT Password and Registry Editor works to change or reset password of any users on Windows NT 3.51, NT 4, Windows 2000, Windows XP, Windows Server 2003, Vindows Vista 32 and 64 bit. It can also detect and offer to unlock locked or disabled user accounts.

Another popular option is the EBCD – Emergency Boot CD, you can see and download it from http://ebcd.pcministry.com/. EBCD is a bootable CD, intended for system recovery in the case of software or hardware faults. It is able to create backup copies of normally working system and restore system to saved state. It contains the best system software ever created, properly compiled and configured for the maximum efficient use. Features are such as copy files from unbootable volume, recover master boot record of HDD, recover deleted file, recover data from accidently formatted disk and floppy disk. EBCD also includes function to change password of any user, including administator of Windows NT/2000/XP OS without the need to know the old password.

Or you can also use the online free Windows XP Login Recovery service at http://www.loginrecovery.com/. Login Recovery is a service to reveal user names and recover passwords for Windows NT, 2000, XP, 2003 and Vista. Free service is available by waiting up to 48 hours and only one free request every three months. For privacy matter people, there may be some uncomfortability as service provider actually ‘know’ your password before sending it back to you.

In all cases, you need to have access to another computer and create a bootable CD for booting on your computer.

2008-05-18 16:08:32 補充：
簡單一點就是可用 Offline NT Password & Registry Editor 或 EBCD – Emergency Boot CD 或 Windows XP Login Recovery service 來重設或找出原來密碼。