How To Reset a Windows 7/windows 2008 r2 server Password

Problem:-
.Insert either your Windows 7 installation DVD, or a Windows 7 System Repair disc, into your optical drive and then restart your computer. If you have either on a flash drive, that'll work too.
Tip: See How to Boot From a CD, DVD, or BD Disc or How to Boot From a USB Device if you've never booted from portable media before or if you're having trouble doing so.
After your computer boots from the disc or flash drive, click Next on the screen with your language and keyboard choices.
Tip: Don't see this screen or do you see your typical Windows 7 logon screen? Chances are good that your computer booted from your hard drive (like it normally does) instead of from the disc or flash drive you inserted, which is what you want. See the appropriate link in the tip from Step 1 above for help.
Click on the Repair your computer link.
Note: If you booted with a system repair disc instead of a Windows 7 installation disc or flash drive, you won't see this link. Just move on to Step 4 below.
Wait while your Windows 7 installation is located on your computer.
Once your installation is found, take note of the drive letter found in the Location column. Most Windows 7 installations will show D: but yours may be different.
Note: While in Windows, the drive that Windows 7 is installed on is probably labeled as the C: drive. However, when booting from Windows 7 install or repair media, a hidden drive is available that usually isn't. This drive is given the first available drive letter, probably C:, leaving the next available drive letter, probably D:, for the next drive - the one with Windows 7 installed on it.
Select Windows 7 from the Operating System list and then click the Next button.
From System Recovery Options, choose Command Prompt.
With Command Prompt now open, execute the following two commands, in this order:
```
copy d:\windows\system32\utilman.exe d:\
```
```
copy d:\windows\system32\cmd.exe d:\windows\system32\utilman.exe
```
To the Overwrite question after executing the second command, answer with Yes.
Important: If the drive that Windows 7 is installed on in your computer is not D: (Step 5), be sure to change all instances of d: in the commands above with the correct drive letter.
Remove the disc or flash drive and then restart your computer.
You can close the Command Prompt window and click Restart but it's also okay in this situation to restart using your computer's restart button.
Once the Windows 7 logon screen appears, locate the little icon on the bottom-left of the screen that looks like a pie with a square around it and then click it!
Tip: If your normal Windows 7 logon screen did not show up, check to see that you removed the disc or flash drive you inserted in Step 1. Your computer may continue to boot from this device instead of your hard drive if you don't remove it.
Now that Command Prompt is open, execute the net user command as shown, replacing myusername with whatever your user name is and mypassword with whatever new password you'd like to use:
```
net user myusername mypassword
```
So, for example, I would do something like this:
```
net user sbt crazyitpro
```
Close the Command Prompt window.
Login with your new password!
While not required, it would probably be wise to undo the hack that makes this work. If you don't, you won't have access to accessibiily features from the Windows 7 login screen.
To reverse the changes you've made, repeat Steps 1 through 7 above. When you have access to Command Prompt again, execute the following:
```
copy d:\utilman.exe d:\windows\system32\utilman.exe
```
Confirm the overwrite and then restart your computer.