How to change the password of already logged on windows.

Using "net user" command to change the user password:

1. Open command prompt. ( "windows + R" and write "cmd" and press enter  )
2. Write "net user" and press enter to get the list of the user accounts of the system.
3. Choose the account you want to change the password of and remember its name.
4. write 'net user <Account Name> <"password"> '

Note: 
-> you can select whatever password you want, just make sure that if your password contains space it must be written in double quotes(").
-> Make sure that you have opened command prompt in administrator mode.
->. If u get and error message like , "System error 5 has occured" try running command prompt in administrator mode.