How to delete administrator password without any software

I Friends :
 I will tell you a way how to delete administrator password  without buying any costly software.
Because i also suffered from the situation when you enter to the any university computer system and you want to install or download any kind of data then computer ask you a administrator password. Now you will be able to do anything on university or any organization just like on your own computer system or on laptop. 

Follow These Simple Steps:

                                Method 1

Step 1. Put your hard disk of your computer in any other pc .
Step 2. Boot that computer and use your hard disk as a secondary hard disk
Step 3. Then open that drive in which the victimac window is installed.
Step 4. Go to location windows->system32->config
Step 5. And delete SAM.exe and SAM.log
Step 6. Now remove hard disk and put in your computer.
Step 7. And boot your computer.

                          Method 2

Boot up with DOS and delete the sam.exe and sam.log files from Windows\system32\config in your hard drive. Now when you boot up in NT the password on your built-in administrator account which will be blank (i.e No password). This solution works only if your hard drive is FAT kind.