i forget the startup password on Windows XP how to remove?

1.This tecnique can only work when your account name moust not be administrator.ok When windows starts and account screen appears then press control+alt+delete then it will show you a screen then in username box type Administrator and during xp installation windows will ask a administrator password if you had set a password on that administrator account then in Password box type that password if there is no password then leave it blank and press ENTER then everything is ok .From that account you can edit your previous account. Note:- Your account of which you forgot the password must not be named as administrator ,the username must be change. I think you can understand.

2.Resetting your administrator password when forgotten it  with out loosing your data. keep the windows cd in the cd drive and restart the pc,  boot with cd drive like when you perform a format of pc.  then select second repair(second time when repair option  occur) when it comes to 33 mins just press shift F10  continuesly then cmd prompt will open there you type  nusrmgr.cpl it will go to user accounts there you can reset  your administrator password also.