following two steps:
trick 1:
Go to Control Panel and click on the Administrative Tools.
Under this section double click on Computer Management.
Select System Tools from right window pane.
Under this, just double click on Local Users and Groups and then on Users
Now
you will see all the login accounts of your computer. Right click on
any the account whose password you want to change and then click on Set
Password.
How to Change Window 7 Password without Knowing Current Password:
A warning message will popup on your screen just click on Proceed button.
Now enter your New Password and click on OK button.
That’s
it! your windows 7 password is changed without knowing current
password. The only limitation of this method is that your current
account should have Administrative privileges.
trick 2:
Command Line then this method is for you.
Open
command prompt by typing with administrative privileges .( Type CMD in
start, right click on it and select Run as Administrative )
In the CMD window type the following command and hit Enter
net user Account Name Your New Password
In
this command replace Account Name by the account name (Account Name is
case sensitive) whose password you want to change and replace Your New
Password by the password that you want to set.
Now
if everything goes alright you will see “The command completed
successfully” on your screen, now type exit command and hit Enter
This will reset your current windows password.
====================enjoy===========================