Method: 1
Follow these steps:
1. Start->Run->,
2. Enter the following command, then press ENTER
compmgmt.msc
3.This should open the
computer management console.
4. Go to local users & groups->users. Right click on any user and select "set
password".
Method: 2
this doesn't require u to know the admin password but still u can change it..
1. Start >> Run >>
2. type
this will open your command prompt
3. type press enter
4.type press enter
for e.g. : net user HOME *(press enter)
5.type new password (press enter) and retype it (press enter).. it will show u confirmation... caution it wont show u the password u type.. but it still types.. the blinking pointer will b there at the same place.. but it still works..
for e.g. : password changed successfully.