How to Bypass a Windows XP Password Without any Programs For example. the account I want to hack is called 'Jim'   1. Restart the pc  2. Repeatly hit F8 during startup so you get the startup menu  3. Start the pc in windows safe mode  4. Log into the default administrator account  5. Goto the control panel and go to user accounts and, create yourself a new admin account with no password  6. Restart the pc and log in normally  7. Log into your new account  8. Then in order select, start, run, and type cmd  9. Press enter and wait for command promt to open  10. Type net user  11. Select the account you want to change, 'Jim' in this case  12. Type net user Jim *  13. Type new password, and verify again  14. Log off  15. Log into Jim with the password you gave it   Btw, your problem could have been caused by malware, a hacker or perhaps someone else is screwing with your PC. That only works IF the default Administrator account doesn't have a password/you know the password, or IF the default Administrator account wasn't changed to something else, and IF it's active ;)    A good sysadmin wouldn't leave a machine with the Administrator account in it's default values... :D