Hack Admin Password From User Mode
Disclaimer: Use this article for eductational purpose ONLY.

Follow these steps:
1. Open command prompt (Start->Run->cmd),
2. Enter the following command, then press ENTER

3. Enter the followin command, then press ENTER:
compmgmt.msc
This should open the computer management console.
4. Go to local users & groups->users. Right click on any user and select "set password".

If you get a "access denied" do the following:

start>run>cmd
then use following commands
1) net user test /add (this command will make test named user)
2) net localgroup administrators test /add (this command will make test user as administrators rights)

and use net user command to reset your admin. password